One Interior Angle in a Regular Polygon

What is the formula for finding ONE interior angle of a polygon?

• 1 int. angle = (n-2)180

• 1 int. angle = (n-180)2

• 1 int. angle = (n-2)180/n

• 1 int. angle = (n - 180)2/n

Find the measure of EACH interior angle in a regular heptagon.

• 128.57°

• 108°

• 120°

• 135°

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

• 90°

• 108°

• 120°

• 180°

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

• 60°

• 80°

• 108°

• 120°

What is the measure of EACH interior angle of a regular octagon?

• 135°

• 180°

• 145°

• 190°

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

• 90°

• 146°

• 162°

• 122°

What is the measure of AN interior angle in a regular triangle?

• 15°

• 30°

• 60°

• 90°

What is the measure of EACH interior angle of a regular octagon?

• 135°

• 180°

• 145°

• 190°

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

• 150°

• 120°

• 1800°

• 20°

Find the measure of ONE interior angle in the regular polygon. Round your answer to the

nearest tenth, if necessary.

• A

• B

• C

• D