7-5, Angles and Polygons (8.G.1, 8.G.2, and 8.G.3)
A regular polygon is a polygon with all sides congruent and all angles congruent. To find the measure of each angle of a regular polygon, divide the sum of the angle measures by the number of angles.
KEY CONCEPTS: Polygon Angle Sum
For a polygon with n sides, the sum of the measures of the interior angles is (n - 2)180 degrees.
KEY CONCEPTS: Polygon Angle Sum
For a polygon with n sides, the sum of the measures of the interior angles is (n - 2)180 degrees.
Angle Sums Activity Lab Summary (6:13)
The Polygon Song (3:19)