A **triangle** is a shape made of three straight sides. A triangle is the
simplest kind of **polygon**. (A polygon is a shape made of straight sides.)

Although a triangle is the simplest kind of polygon, it is a very important shape. This site shows you one reason triangles are important and lets you play with different kinds of triangles.

*Copyright Glen Prideaux,
2002.This page may be freely copied for non-commercial use. If you wish
to reproduce this page elsewhere, you will also need the JSP applet from Key
Curriculum Press. Click the ? in the bottom right corner of any of the
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