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Regular and Irregular Polygons

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A regular polygon is the one where all the sides are equal and all the angles are equal.

Regularirr 1

An irregular polygon is one that is not regular.

Regularirr 2

Let's go through some examples.

Example 1

Is this polygon regular or irregular?

Regularirr 3

This triangle is a regular triangle. All three side lengths and angles are equal.

 

Example 2

Is this polygon regular or irregular?

Regularirr 4

By counting the sides, we can see that this is a five sided figure. It is a pentagon. Since, the sides are not equal. Therefore, it is an irregular pentagon.

Summary
  • A polygon is a closed figure made up of line segments.
  • A regular polygon is the one where all the sides are equal and all the angles are equal.
  • An irregular polygon is one that is not regular.
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