ESL Polygon Vocabulary

Front

a polygon with five (5) sides and five (5) interior angles

Back

pentagon

Front

the angles OUTSIDE of a shape

Back

exterior angles

Front

the angles INSIDE a shape

Back

interior angles

Front

a line segment that joins two vertices in a shape

Back

side(s)

Front

a polygon with all equal angles

Back

equiangular

Front

a polygon with all sides of equal length

Back

equilateral

Front

a polygon with both equal sides and equal angles

Back

regular polygon

Front

the point where two sides of a polygon meet

Back

vertex/vertices

Front

the sum of the interior angles of a polygon with n sides is (n-2) × 180°

Back

interior angle sum formula

Front

the minimum number of sides a polygon can have

Back

3 (triangle)