Polygon Sum Conjecture

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

• 36
• 10
• 18
• 40

Find the measure of ONE interior angle of a regular dodecagon.

• 150
• 120
• 1800
• 20

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

• (n - 2)180
• (n - 1)180
• 360
• (n - 3)(180)

Find the sum of the interior angles of a nonagon.

• 1260
• 900
• 1620
• 180

Solve for x. 

• 100
• 120
• 125
• 130

Tags

CCSS.3.MD.D.8

Find the measure of one interior angle in regular 25-gon. Round your answer to the nearest tenth if necessary.

• 164.3⁰

• 167.1⁰

• 165.6⁰

• 166.7⁰

Find the value of x.

• 540⁰

• 121⁰

• 134⁰

• 360⁰

• The measure of the largest interior angle

• The number of sides of the polygon

• Nothing

• The number of triangles that compose the polygon

A polygon's interior angles add up to 2700.  How many sides does the polygon have?

• 17
• 15
• 19
• 11

Find the sum of the angle measures in this polygon.

• 1080

• 540

• 1440

• 720