The Math Forum - Corner for Interactive Geometry Software

 CIGS = Corner for Interactive Geometry Software

The Geometer's Sketchpad
Three Labs

Mike Riedy

Sketchpad Resources || Main CIGS Page

Shown below are snapshots of dynamic sketches. To participate in these activites, make sure your browser is set up to use GSP as a helper application, and click on the links or pictures to launch the sketch.

Rotation & Translation Exploration

Click and drag points and/or lines in this sketch in order to place the yellow triangle on top of the red triangle.


Create a cycloid by tracing the locus of a point on a circle as the circle translates along a line segment.

Area of a Parallelogram

Explore the relations between various distances and the area of the parallelogram in this sketch. What happens to the area when we drag D along the line CE?

Area of a Rectangle

What happens to the area when we slide D along the line? What stays the same? Compare the area of the triangle with the area of a related parallelogram.

Comments? Questions? Send them to Mike Riedy.


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