Lesson Explainer: Interior Angles Of A Polygon - Nagwa

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In this explainer, we will learn how to find the sum of the measures of the interior angles of a polygon given the number of its sides and the measure of an angle in a regular polygon.

Definition: Polygons

A polygon is a simple two-dimensional closed shape made up of straight line segments called sides. Each point where two sides of a polygon meet is called a vertex (the plural is “vertices”).

The number of sides and the number of interior angles in a polygon are equal, and this number is generally used to classify the shape.

We may already be familiar with the names of simple polygons. For example, a three-sided polygon is called a triangle. The table below shows the general names for 𝑛-sided polygons for 2

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