IM2 1.2.3 Interior & Exterior Angles of Polygons

Front

What is the formula for the sum of interior angles of a polygon with n sides?

Back

(n - 2) × 180°

Front

If an interior angle of a regular polygon is 120°, how many sides does it have?

Back

6 sides

Front

What is the measure of each exterior angle of a regular polygon with n sides?

Back

360° ÷ n

Front

What is the sum of exterior angles of any polygon?

Back

360°

Front

How do you calculate the sum of interior angles for a polygon?

Back

(n - 2) × 180° where n is the number of sides.

Front

What is the measure of each interior angle of a regular pentagon?

Back

108°

Front

What is the measure of each exterior angle of a regular pentagon?

Back

72°

Front

What is the sum of interior angles for a 27-gon?

Back

4500°

Front

What is the measure of each exterior angle of a 20-gon?

Back

18°

Front

How many sides does a polygon have if each interior angle measures 140°?

Back

9 sides