Polygon Angle Sum Theorem

Front

A polygon with 5 sides is called a(n) _____________.

Back

pentagon

Front

Find the sum of the angles measures of a 21-gon.

Back

3420

Front

Find the measure of one angle of this REGULAR polygon with 10 sides.

Back

144

Front

Find the sum of the angle measures in a hexagon.

Back

720

Front

Find the measure of the missing angle in a triangle if two angles are 50° and 60°.

Back

70°

Front

What is the formula to calculate the sum of interior angles of a polygon?

Back

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

Front

How many sides does a polygon have if the sum of its interior angles is 1080°?

Back

8 sides (octagon).

Front

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

Back

108°.

Front

If a polygon has 12 sides, what is the sum of its interior angles?

Back

1800°.

Front

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

Back

60°.