Interior and Exterior and Numbers of Sides in Polygons

What is the SUM of the angle measures in a DECAGON (10 sides)?

• 1440°

• 900°

• 1080°

• 1260°

What is the measure of ONE interior angle in a regular pentagon (5-sides)?

• 90°
• 108°
• 120°
• 180°

What is the measure of ONE interior angle of a regular 20-gon?

What is the sum of exterior angles of a pentagon?

• 180

• 360

• 540

• 760

Find the value of x

• 141
• 150
• 135
• 163

The sum of the exterior angles of a polygon is __________________ where n is the number of sides.

• 360
• n
• (n - 2)180
• (n - 1)180

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

How do the interior and exterior angles of a polygon relate?

• They are complementary

• They are congruent

• They are supplementary

• They have no relationship

• 16 sides

• 18 sides

• 20 sides

• Not enough information

Find the value of y.