Investigating Geometry with GeoGebra

Henrico County Public Schools

Three Tramsformations

READ the instruction below and INTERACT with the GeoGebra applet on the right.

  1. Move blue A, B or C points to change the size or shape of the blue triangle. What happens to the other triangles?

  2. Next, move the blue points on the line segment. Observe what happens.

  3. Now, move point O. Observe the changes in the triangles. Is this true for any figure? Why?

  4. Okay, now move the red point to the right.

  5. Compare the images in terms of size, shape, position, and orientation. What is the same? What is different?
Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and activated. (click here to install Java now)