CPM Geometry Chapter 8

Find the measure of ONE exterior angle of a regular decagon.

• 36
• 10
• 18
• 40

A polygon with 8 sides is called a(n) __________________.

• octagon
• decagon
• heptagon
• dodecagon

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

• 180n - 360

• 180n

• 360

• 180n - 180

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

Find the measure of angle E.

• 9
• 97°
• 48°
• 79°

Solve for x. 

• 100
• 120
• 125
• 130

What is the sum of the interior angles for a      24-gon

• 3960
• 360
• 15
• 4280

Find the value of X.

• 60
• 120
• 85
• 55

A regular nonagon (9 sides) can be divided into nine congruent triangles. What is the measure of one of the central angles?

• 140°

• 180°

• 40°

• 1260°

What is the measure of ONE interior angle in a regular pentagon?

• 90°

• 108°

• 120°

• 180°