Angle Sum of Polygons

If the sum of the interior angles is 3600°, what is the name of the polygon?

• 15-gon

• 18-gon

• 22-gon

• decagon

Find the value of X.

• 60

• 120

• 85

• 55

Solve for x. 

• 12

• 10

• 25

• 5

What is the exterior angle sum of ALL polygons?

• ^90o

• 180^o

• 270^o

• 360^o

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

• 90°

• 108°

• 120°

• 180°

The sum of the interior angles of an n-sided polygon is given by the expression (n - 2) * 180. Find the interior angle sum for a nonagon.

• 1260 degrees

• 1440 degrees

• 1520 degrees

• 1620 degrees

The sum of the interior angles of a dodecagon is given by the expression (n - 2) * 180. Find the interior angle sum for a dodecagon.

• 1440 degrees

• 2160 degrees

• 1800 degrees

• 1620 degrees

Pentagon PQRST above models one side of a building. The sum of the interior angles of the pentagon is 540 degrees, the measure of angle R is 100 degrees, and angle Q is congruent to angle S. What is the measure of angle Q?

• 92 degrees

• 130 degrees

• 106 degrees

• Not here

Find the value of x

• 141

• 150

• 135

• 163