Quadrilateral
Definition

A quadrilateral is a polygon with four sides (and four interior angles).


Quadrilateral

Real World Examples
http://www.clipart.com_Filename:5323_030929_108435.thb http://www.clipart.com_Filename:010829_0955_0247_l__p.thb

Demonstration
Image only

Instructions text as in global.js

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