Investigating Geometry with GeoGebra

Henrico County Public Schools

Key Reflection

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

  1. Move points A and/or B to move the solid line. What happens to the figures?

  2. Next, click on the left KEY and drag it. What happens to the solid line?

  3. Compare the two key images in terms of size, shape, position, and orientation. What is the same? What is different?

  4. Is this always true for any figure? Why?
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)