Rectangle
Definition

A rectangle is a parallelogram with a right angle.


Rectangle

Note that in a rectangle the opposite sides are congruent (equal in measure).

Real World Examples
http://www.clipart.com_Filename:c06a474.thb http://www.clipart.com_Filename:020422_1458_0004_d__s.thb
Demonstration
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Instructions text as in global.js

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