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Square Octagon Tessellation
Published on 2013-01-02 06:00:00
One of the objectives of GeoGebra Applet Central this year is to update the output files of my GeoGebra Tutorial Series. The previous outputs were still in version 3.2. The applet below is the output of GeoGebra Tutorial 10 - Vectors and Tessellatio
Year 2012 in Review - The Most Popular Posts
Published on 2012-12-31 05:30:00
It's the end of the year and it's time to look back your favorite posts. Below are the most popular posts for 2012 in terms of traffic (Source: Google Analytics). GeoGebraTube: 12000+ applets and counting Pythagorean Theorem Proof Animation Using B
Square Rectangle Tessellation
Published on 2012-12-08 02:26:00
The applet below is another tessellation. It is composed of rectangles and equilateral triangles. It is one of the demiregular tessellations. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks l
GeoGebra 4.2 Released
Published on 2012-12-06 15:12:00
GeoGebra 4.2, the newest version of GeoGebra, is now available for download. Here are the links to know more about the new features. Overview of the New Features The Official Release Notes A more detailed explanation of the Release Notes GeoGebra
Hexagon Triangle Tessellation
Published on 2012-11-27 05:00:00
Move Points A and B to explore the figure. Explain why the figure tessellates. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.jav
GeoGebra 4.2 Release Candidate
Published on 2012-11-17 17:44:00
The Release Candidate of GeoGebra 4.2 is now available. Several of its new features are explained by Balazs Koren in the official GeoGebra blog. I have also written a Sneak Peek on its new features. The Sneak Peek includes the following topics: Sn
Slope of a Line
Published on 2012-10-24 21:32:00
The line below can be changed by dragging the blue points to a different location or by dragging the entire line. Points C and D can be moved along the line, but they cannot change the line. Move C and D along the line and calculate the ratio m= ∆y/∆x=(y2- y1)/(x2- x1) for several different positions of the points. Show the equation of the line and look for a relationship between the
Tessellation 2: Square, Hexagon, Triangle
Published on 2012-10-18 06:00:00
The figure below shows that a plane can be tessellated using 3 regular polygons: squares, hexagons, and triangles. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
The GeoGebra 4.2 Sneak Peek Series
Published on 2012-10-08 00:38:00
I have started writing about the new features of GeoGebra 4.2 in the GeoGebra 4.2 Sneak Peek Series. The series will cover the major changes and new features of GeoGebra. As of this writing, there are already three articles in the series. I will update the series from time to time. If all goes well, GeoGebra 4.2 will be released within the year. The GeoGebra for iPad Kickstarter Project has
New GeoGebra Institute Website
Published on 2012-09-26 20:33:00
The GeoGebra Institute of Metro Manila has a new website. We have moved some of the applets and have also created a new GeoGebra Primer. We will be accepting contributors from Filipino GeoGebra users starting next month. If you are interested, you may contact me at nismedmultimedia@gmail.com. The GeoGebra Institute of Metro Manila is the first GeoGebra Institute in the Philippines. The
Demiregular Tessellation 1
Published on 2012-09-19 07:00:00
Move point A and point B to explore the tessellation. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com There is no clear definition of what demi-regular tessellations are. Some sources say that there are 14 of them, but give different types. Some also say that there
A journey along the graph of a function
Published on 2012-09-14 22:51:00
Increasing and Decreasing Functions Click the Start button to start the journey of the Tortoise along the graph of the function. When the Tortoise stops, click on him to start the next section of the trip. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Irina
Increasing and Decreasing Functions
Published on 2012-09-12 23:48:00
Use the check boxes to show/hide the objects and use the slider to move the points. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com In an increasing function, the value of y-increases as the value of x-increases. On the other hand, in a decreasing function, the value
The Euler Line
Published on 2012-08-31 23:55:00
In the figure below, the green, red, and violet 'points' are the orthocenter, centroid, and circumcenter of triangle ABC respectively. Move the points A, B, and C and notice what happens. Use these points to create different types of triangles. What do you observe? This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't
GeoGebra for the iPad Project Needs Your Support
Published on 2012-08-20 20:44:00
The International GeoGebra Institute has started a Kickstarter project for the GeoGebra the iPad. The project aims to create an iPad application for GeoGebra. If the project is completed, the GeoGebra iPad app will be available for download (for free) at the Apple Store. Please help us raise $10,000 for the project. For more information about the project, click here.
GeoGebraTube: 12000+ applets and counting
Published on 2012-07-14 00:59:00
GeoGebraTube, the official applet repository site of GeoGebra, has now more than 12000 GeoGebra applets after a year it has gone live — thanks to GeoGebraists all over the world. Applets in GeoGebraTube can be downloaded (including the GGB file), embedded in blogs or websites, or shared to colleagues and friends using social media sites. Recently, the site has also allowed Google, Facebook
Sums and Product
Published on 2012-06-28 09:07:00
Move the green point to a desired location, and then move the red point and observe what happens. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Questions 1.) What do the numbers on the side of the rectangle represent? 2.) What does the number
GeoGebra launches official blog
Published on 2012-06-25 04:32:00
GeoGebra recently launched the official GeoGebra blog . Theblog will contain the latest news, tips, tricks, and everything about GeoGebra. According to the administrator, The blog will also feature post contributions fro GeoGebra bloggers all over the world. Recently, GeoGebra is also starting to integrate theorem proving.
One month leave ends on June 22nd
Published on 2012-06-18 09:32:00
You are probably wondering why I stopped updating this blog for a month. Well, I am quite busy, so I thought I needed a month off. We have a new curriculum here in the Philippines, so our institute is working on the new teaching guides and learning packages. This takes most of my time at work, and for the past month, I am bringing some of my work home. In addition, I am also growing The
The Arithmetic Mean Geometric Mean Inequality
Published on 2012-05-22 04:25:00
Move A along the circumference of the semi-circle. What can you say about the relationship between AD and the radius of the circle? This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
Bézier Curves -How the Recursive Algorithm Works
Published on 2012-05-13 23:16:00
A set of n+1 points will create a Bézier curve of n-th order. Drag the first slider to select the number of points. Drag the point on the slider "Recursion Level" to 1 to see the first new set of points. Continue dragging the Recursion Level slider to the end to see all recursive steps and how the last point, generating the Bézier curve, is constructed. Hit the Play button to follow the
Angle Bisector of a Right Triangle
Published on 2012-05-07 04:32:00
Move point P. What do you observe? This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com What can you say about the diagonal of the outer square in relation to its angles? in relation to the right triangles formed by the square? What can you say
Trisecting a Segment
Published on 2012-05-01 13:53:00
Move the point on the slider to the right to perform geometric construction. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Can you see why AG is one third of AB?
Arcs and Triangles
Published on 2012-04-25 16:20:00
Given isosceles triangle ABC whose length of the shorter leg is n, and arcs center at B and C, what is the area of the shaded part? This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Download File
Two Squares and a Quadrilateral
Published on 2012-04-17 04:53:00
A common vertex is shared by two squares A. Quadrilateral HIJK is formed using the segments joining the vertices and the midpoints of the diagonals of the square. What is the shape of the quadrilateral? This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you
Segment Division
Published on 2012-04-06 20:07:00
This applet shows how to divide a segment into n equal parts. A slider was used together with the segment command. This is the output of GeoGebra Tutorial 16 - Slider, Sequence, and Segment Division of the GeoGebra Intermediate Tutorial Series. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like
Folded Tape
Published on 2012-04-03 09:45:00
Drag the blue point to fold the tape. What type of triangle is the overlapped part? Justify your answer. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Download File
Overlapping Squares II
Published on 2012-03-28 04:13:00
1.) Move the red point. What do you observe? 2.) What can you say about the green and the blue triangles? 3.) Make a conjecture about the triangles. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com 4.) Click the Show Blue Point
Overlapping Squares
Published on 2012-03-24 10:34:00
Move the blue point and observe what happens. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Make a conjecture about the area of the overlapping regions. Prove your conjecture.
The Angle Trisector
Published on 2012-03-20 19:08:00
In the figure below, |AB| = |BD| = |CD|. Move point P and observe the figure. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com What kind of triangle is triangle BDC? Make a conjecture about the relationship
Systems of Linear Equations
Published on 2012-03-16 02:06:00
Move the sliders a, b, c and d to explore the graphs of the linear functions y = ax + b and y = cx + d. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com When are the graphs
Fibonacci Numbers and the Fibonacci Spiral
Published on 2012-03-12 19:42:00
Fibonacci Numbers and the Fibonacci Spiral - GeoGebra Dynamic Worksheet This is one applet for constructing Fibonacci Squares and the Fibonacci spiral. The Fibonacci spiral is made up of quarter-circular arcs whose radii are consecutive Fibonacci numbers. You can read detailed instructions under the applet, short instructions at the left side
Line through Two Points
Published on 2012-03-10 02:59:00
Move sliders m and b to approximate the line that passes through the two points. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com The applet above shows that given two points, a line maybe drawn through them which is the first postulate of Euclid
Odd Number Theorem
Published on 2012-03-04 08:50:00
Move the slider and observe what happens. How many 1 by 1 squares are added each time the slider increases by 1? What is the total number of colored squares 1 by 1 if n = 3, 4, 5? What can you generalize from your observations in 1 and 2? This is a Java Applet created using GeoGebra
Square Within a Square
Published on 2012-03-01 06:55:00
Given a square with side length a and two pairs of parallel segments, find the area of the shaded square. You can move point B to change the size of the square or point A to change the size of the inner quadrilateral. This is a Java Applet created using GeoGebra from www.geogebra.org
Pythagorean Theorem Proof
Published on 2012-02-22 19:58:00
Given congruent squares P and Q, each of which, containing four congruent right triangles. Move point A to change the size of the rectangle or point B to change the size of the squares. This is a Java Applet created using
Mathematics and Multimedia Carnival 20
Published on 2012-02-19 17:12:00
Welcome to the 20th edition of the Mathematics and Multimedia Blog Carnival - Dartboard Edition. Here are the posts I have collected this month; some from the blog carnival site and some from my RSS Feed. Before we begin a carnival, let's have some trivia about the number 20. The number of sectors in a dartboard. The atomic number of calcium. It is the smallest primitive abundant
GeoGebra 4.0 Essentials Series
Published on 2012-02-17 10:24:00
My apologies. I am quite busy for the past two weeks, and looks like I am going to be busy until the first week of March. Anyway, for those who had not visited Mathematics and Multimedia recently, the GeoGebra Essentials Series had already been updated to version 4.0. The first 10 tutorials in the GeoGebra Intermediate Tutorial Series were also updated last month. I hope this will
New Blog: Mathematical Palette
Published on 2012-02-12 07:32:00
Hi all. I have been very busy these past days, I hope to be back next week to create more GeoGebra applets. One of the reasons that I am busy because I am setting up a new blog titled Mathematical Palette. It's a blog that celebrates mathematical art, beauty, and wonders. I will be discussing non-content mathematics. I will focus on the connections of mathematics to other fields such as
Animation Using Bézier Curves
Published on 2012-02-03 12:23:00
"A Bézier curve is a parametric curve frequently used in computer graphics and related fields. Bézier curves are also used in animation as a tool to control motion. In animation applications, such as Adobe Flash and Synfig, Bézier curves are used to outline, for example, movement. Users outline the wanted path in Bézier curves, and the application creates the needed frames for the object to move
Sum of Vectors
Published on 2012-01-30 18:36:00
This applet shows the graphical represenentation of the sum of two vectors. In the graph, u and v are vectors, and w = u + v. BD is the translation of AC and CD is the translation of AB. AD represents the sum of the vectors. This is a Java Applet created using GeoGebra
Math and Multimedia Carnival will be hosted here
Published on 2012-01-26 21:57:00
The Mathematics and Multimedia Carnival is on its 20th edition and will be hosted here. If you have a blog post about school mathematics, mathematics teaching and learning, multimedia tools, or any related article, you may submit here or email me directly at mathandmultimedia@gmail.com. The deadline of submissions is on February 18, 2012 and the post date is on February 20. You may want
Deriving the Equation of the Parabola
Published on 2012-01-25 07:00:00
Instructions: Move point A to adjust the position of the vertical line and move F along the x-axis as desired. Move C along the line and observe what happens. This is a Java Applet created using GeoGebra from www.geogebra.org - it
Tangram Puzzle: Constructing a Square
Published on 2012-01-19 10:30:00
Move the tangrams to construct a square. Drag the interior to change their position and use the 'blue point' on the vertex to rotate. This is a Java Applet created using GeoGebra
Squaring a Convex Polygon
Published on 2012-01-16 17:17:00
This applet constructs a triangle with an area equal to the area of any convex polygon ABCDEF. The applet Squaring a Triangle shows how any triangle can be transformed to a square with an equal area. The combination of these two constructions shows how to square any convex polygon. Click on point F. Drag F to the right as far as it can go. Repeat these two steps three times,
Squaring a Triangle
Published on 2012-01-15 21:41:00
This applet shows the construction of a square with the same area as a given triangle. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com Author: Irina Boyadzhiev of Ohio State
Area of Triangles Under a Curve
Published on 2012-01-08 23:21:00
Given: Right triangle BCD whose hypotenuse is tangent to the function f(x) = a/x. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now) Move slider a and observe what
Largest Triangle
Published on 2011-07-05 20:01:00
What is the largest equilateral triangle that can be cut from a square with side length 1 unit. Drag points P and Q to find out. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active
July 2011 Top Posts
Published on 2011-07-03 06:02:00
Here are the most popular posts for July 2011. Enjoy exploring. The Pantograph Circle Approximation Graph Viviani's Theorem created with GeoGebra 4.0 beta Circles and Arbelos Triangles and Quadrilaterals Visualizing Multiplication of Fractions The G
Linear Approximation of a Function
Published on 2011-07-01 09:18:00
In the textfield you can input the function you want. Double click the applet to open it in a new window. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
You are invited to a GeoGebra Seminar!
Published on 2011-06-27 22:08:00
The University of the Philippines National Institute for Science and Mathematics Education Development (UPNISMED) will conduct a three-Saturday seminar-workshop on using GeoGebra in the teaching and learning of high school mathematics on August 6, 1
The Excess (or Missing) Area
Published on 2011-06-26 09:00:00
Click the Play button at the bottom-left of the applet to animate. What do you observe? Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click her
What is a square?
Published on 2011-06-25 01:49:00
A square is the locus of all the points in a plane for which the sum of the distances from two given perpendicular lines is constant. Drag point I to find out. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or l
Rectangle with Constant Perimeter
Published on 2011-06-23 05:27:00
Move the dot on Slider A. What do you observe? Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)
The Eutrigon Theorem
Published on 2011-06-18 17:21:00
Move point B or point C. What do you observe? Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now) The central triangle with one a
The Pantograph
Published on 2011-06-13 19:05:00
A pantograph is a mechanical linkage connected in a special manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical movements in a second pen. If a line drawing is traced by the first point, an ident
Trisection of an Angle
Published on 2011-06-12 13:43:00
The segment ΓΔ and the angle ΑΟΒ are moving with constant speed and agree with OA at the same time. The point Z is the section of segments OB and ΓΔ, and the red curve is the trace of Z. Using this curve we can find the trisects of an acute an
Visualizing Multiplication of Fractions
Published on 2011-06-11 07:07:00
Drag slider m to determine the fraction m/10 and drag sliders n to determine the fraction n/10. The area of the overlapping rectangles is the product of the fraction. This is a Java Applet created using GeoGebra from www.geogebra
Circles and Arbelos
Published on 2011-06-08 00:08:00
The area of the circle determined by the tangent line to the two internal circles equals the area of the arbelos (the red area). This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have J
Viviani's Theorem created with GeoGebra 4.0 beta
Published on 2011-06-05 10:56:00
Viviani's theorem, named after Vincenzo Viviani, states that the sum of the distances from a point to the sides of an equilateral triangle equals the length of the triangle's altitude. This is a Java Applet created using GeoGebra from www.geogebra
The GeoGebra 4.0 Sneak Peek Series
Published on 2011-06-04 02:31:00
If you have enjoyed the GeoGebra Tutorial Series, I have created the GeoGebra 4.0 Sneak Peek series to discuss what's new in GeoGebra 4.0 in my main blog Mathematics and Multimedia. Here are the first two posts: Sneak Peek 1: The New Tools Sneak Pee
Polygons with equal area
Published on 2011-05-28 23:02:00
This applet is part of the lesson on Constructing Polygons with Equal Area posted in Mathematics for Teaching blog. 1. Drag point B. What do you notice about the area of the polygon? 2. Drag point C. What polygons are formed? What can be said a
Triangles and Quadrilaterals
Published on 2011-05-27 02:26:00
Given ABC is a triangle with base b and height h. Points D and E are midpoints of AB and BC, respectively. Instructions 1. Move the slider h to determine the height of the triangle. 2. Move points A, B, and C to choose the shape of the triangle. 3.
Pythagorean theorem
Published on 2011-05-20 17:31:00
Pythagorean Theorem: In any right triangle, the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares whose sides are the two legs. view the GeoGebra applet in a new tab. Sorry, the GeoGebra Applet cou
Ferris Wheel
Published on 2011-05-19 10:06:00
I am a little stressed out. I want to relax and ride on a GeoGebra Ferris Wheel. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)
Sliders and Rhombuses
Published on 2011-05-17 05:59:00
This construction demonstrates how a rhombus can be determined by a length and an angle given one point. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your
Reducation and Enlargement
Published on 2011-05-13 23:19:00
This applet shows the enlargement/reduction of a triangle with scale factor k and center O. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to insta
The Dancing Triangle
Published on 2011-05-08 00:01:00
Move the vertices to choose the shape of and observe what happens. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now) What do you o
Trigonometric Numbers
Published on 2011-05-04 18:34:00
An applet that computes the trigonometric numbers of an angle. View the applet in a new tab. Download the applet. theorhma.blogspot.com Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed
Approximating Pi
Published on 2011-05-04 00:00:00
In the ancient times, there was no direct way to find the area of a circle. Mathematicians approximate it by using inscribed polygons. Since it is possible to find the area of any polygon by dividing it into triangles, it is also possible to approx
Tracing the Derivative
Published on 2011-05-02 22:06:00
Consider the function $f(x) = x^2 - 3x$. The number m is the slope of line a tangent to f at Point A. Point B is the ordered pair (n,m) where n is the x coordinate of A and m the slope of line a. Now drag point A along the graph. What do you observe?
Technical Problems
Published on 2011-05-02 20:13:00
For some reason, the GeoGebra applets have stopped displaying in my browser. I am not sure if it's the firewall of our university or a Google problem. Please inform me if the applets do not also appear in your browsers. I'll post another applet
SOF moved to a new URL
Published on 2011-04-30 01:06:00
My other blog, School of Freebies, has moved to a new server and a new URL. You may also want to check out my other blog Mathematics and Multimedia, home of more than 50 GeoGebra tutorials. For a little history, GeoGebra Central was an offshoot of
Moving The Triangle Sides
Published on 2011-04-29 04:35:00
an applet that moves the triangle sides in given distance. Open the applet in a new tab. Download the applet. theorhma.blogspot.com
Good news: Downloadable applets
Published on 2011-04-27 19:40:00
Hi guys, this is to inform you that from now on, all applets that I will post will be available for download. I will look for the old files and upload them this weekend. I will also encourage other contributors to do the same. Thank you very much.
Folding a Hyperbola
Published on 2011-04-26 01:12:00
Click the Play button at the lower-left corner of the applet and observe what happens. The border of the locus of lines formed by the perpendicular bisector of the segment connecting the point moving on the circle and the fixed point outside the c
Cycloid
Published on 2011-04-24 14:43:00
One applet in wich you can see how the curve of cycloid is created. Properties of cycloid: It is the curve of fastest descent under gravity. The period of an object in descent without friction inside this curve does not depend on the ball's starting
Shape properties of quadrilaterals resources from www.MathsMaster.Org
Published on 2011-04-24 06:29:00
Two fantastic Geogebra applets have been included in the 'shape properties of quadrilaterals' resources on www.MathsMaster.Org. The first is a great activity where you have to drag the vertices of a quadrilateral to make different shapes, watching th
Parameters of Trigonometric Functions
Published on 2011-04-23 11:27:00
Use the sliders to investigate the graph of the trigonometric function f(x) = a sin (bx - c) + d. Use the check boxes to show the graphs of the other trigonometric functions. Sorry, the GeoGebra Applet could not be started. Please make sure that J
Circumcenter of a Circle
Published on 2011-04-19 21:46:00
Drag the vertices of the triangle and check the check boxes to investigate. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to instal
GeoGebra Applet Central opens up for contributors
Published on 2011-04-19 20:00:00
If you are a GeoGebra user, or a blogger that uses GeoGebra, and you want to promote your blog, I am inviting you to post some of your applets here. Your applets will be credited to you, and if you have a blog or website, you are permitted to link
The Inscribed Angle Theorem
Published on 2011-04-18 07:53:00
1.) Move the points on the circle. What do you observe? 2.) Explain why your observation will always be true for all angles. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in y
The Hypocycloid
Published on 2011-04-15 22:55:00
In geometry a hypocycloid is a special plane generated by the trace of a fixed point on a small circle that rolls within a larger circle. It is comparable to the cycloid but instead of the circle rolling along a line, it rolls within a circle. To ani
Rectangle Area
Published on 2011-04-13 20:28:00
Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)
Teaching coordinates of points
Published on 2011-04-13 01:41:00
This applet is used in the lesson in the post Investigating coordinates from Teaching K-12 Mathematics Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your br
Circle Approximation Graph
Published on 2011-04-12 21:27:00
1.) Move slider r below to adjust the radius of the circle. 2.) Move slider n and observe what happens. 3.) Make a conjecture about your observations This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have
The Nine-Point Circle
Published on 2011-04-10 19:10:00
Move the vertices of the triangle and observe what happens. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com The nine-point circle is the circle passing t
Error in Posting and New Blog Contributor
Published on 2011-04-10 16:17:00
Hi guys. I have been trying to post applets since Saturday, but no luck so far (I always get an error). Maybe it's a GeoGebra bug. I'll email Michael Borcherds (Lead Developer) later. By the way, I am welcoming another new contributor of this blog
Making Triangles from www.MathsMaster.Org
Published on 2011-04-08 10:29:00
The following is a lovely activity to get pupils discussing triangle shape properties. This and many more fantastic Geogebra applets are available from www.MathsMaster.Org. The site also contains lots of excellent maths video tutorials and activities
Paper folding and proof
Published on 2011-04-06 03:51:00
In this applet, we will show how to construct a quadrilateral by simulating the paper folding process. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here
Centroid of a Triangle
Published on 2011-04-06 01:26:00
Drag the vertices or the sides of a triangle and observe what happens. What do you observe? Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to insta
What's New
Published on 2011-04-03 03:08:00
Hi everyone. This blog has been quite inactive in the past, but I will try my best to create more applets in the future. As you can see, we have a lot of new stuff: I have created five more tabs: Post List, Top Posts, Blogroll, Links and Tutorials.
GeoGebra Links
Published on 2011-04-01 15:56:00
A. OFFICIAL LINKS GeoGebra Offical Website GeoGebra Download Site GeoGebra Forum GeoGebra Wiki The GeoGebra B. WHAT’S NEWIntroduction to GeoGebra Prim Beta GeoGebra 4.0 Beta (You may want to look at the release notes) GeoGebra 5.0 (with 3d) Apri
Addition of Integers
Published on 2011-03-31 20:35:00
Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)
Announcement: New RSS Feed
Published on 2011-03-30 13:37:00
Hi guys. I am sorry, but I think I messed up with the RSS feed while reconfiguring this blog. Please change your RSS feed to http://feeds.feedburner.com/blogspot/IzVgCo Thank you very much.
Graphs and Their Properties
Published on 2011-03-24 19:01:00
Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)
Questions:
1.) Which interval/s of the function f is/are increasing? is/are