Rotation and Area Relationship

1. ABCD' is a square. What shape is IJKL? Justify your answer.
2. What is the relationship between the area of ABCD' and IJKL?
3. Move slider α to the extreme right to verify 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

The Square Problem

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)


Note: You can save the ggb file using the File menu.