# G.GCO.10 Rectangle Template

- Author:
- Dan Dale, Tim Brzezinski

- Topic:
- Rectangle

The applet below contains a quadrilateral that ALWAYS remains a rectangle.
The purpose of this applet is to help you understand many of the geometric properties a rectangle has.
Interact with this applet for a few minutes. As you do, be sure to move

**points**around! What do you notice about the relationships of opposite sides? What do you notice about the 4 angles? What do you notice about the lengths of the diagonals? Do the diagonals always bisect each other? Are the diagonals perpendicular? Are the diagonals angle bisectors?*A*,*B*, and*D*