Angle Sum Theorems

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

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

Solve for x. 

• 100

• 120

• 125

• 130

Find the value of x.

• 540⁰

• 121⁰

• 134⁰

• 360⁰

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

• 17

• 15

• 19

• 11

What is the SUM of the angle measures in a 35-gon?

• 180°

• 5940°

• 1080°

• 169.71°

• The measure of the largest interior angle

• The number of sides of the polygon

• Nothing

• The number of triangles that compose the polygon

Find the interior angle SUM for each polygon. Round your answer to the nearest tenth if necessary.

• 1440º

• 1800º

• 2520º

• 2700º

Find the interior angle SUM for each polygon. Round your answer to the nearest tenth if necessary.

• 720º

• 1080º

• 360º

• 1440º