Friday, December 24, 2010

Doodling in Math Class (Stars) Update 1

This post is an update to Doodling in Math Class.

Experimenting with GeoGebra sliders and trace.

Just hit the play button to begin the animation (NOTE: You MUST check "trace" to see the animation, it helps if you uncheck "paths"). Use the refresh icon on the top right of the applet to clear the traces. Be sure to check/uncheck the "trace" and "paths" to see what they do. Double-click on the applet to load and save a copy. Colors are what they seem, they identify a closed path/walk. Use the "coloroffset" to cycle through the other colors.


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)


Mr. H, Created with GeoGebra



Post in this series:
Doodling in Math Class
Doodling in Math Class (Stars) Update 1

Wednesday, December 15, 2010

Doodling in Math Class

Self-described recreational mathemusician Vihart has a great series of videos on doodling in math class. The videos are fast-paced, quirky, and combines two things that I love: math and doodling. One of them first came up as a share on Google Reader. I was hooked 10 seconds into the first video. If you like math and doodling, you'll see why. Be sure to check out other videos at her site or subscribe to her YouTube channel.



Here's a GeoGebra applet that you can use to explore some patterns described in the video. Interesting patterns to look for include finding combinations of P (points) and Q that create asterisks, polygons, and stars that can be formed with a single path. Explore what shapes can be formed when one number is a multiple of the other, when they are relatively prime, when they are square numbers, successive Fibonacci numbers, etc. If you find interesting patterns, please comment below.


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)

Mr. H, Created with GeoGebra



Post in this series:
Doodling in Math Class
Doodling in Math Class (Stars) Update 1