Angles of a Polygon

(n-2)180

Formula for sum of interior angles of an n-gon

20

How many sides does a regular polygon have if the measure of ONE exterior angle is 18°?

140°

If one exetrior angle of a regular polygon is 40°, what is the measure of one interior angle?

6

If the measure of ONE interior angle of a regular polygon is 120°, how many sides does it have?

8

If the measure of ONE interior angle of a regular polygon is 135°, how many sides does it have?

3

If the measure of ONE interior angle of a regular polygon is 60°, how many sides does it have?

4

If the measure of ONE interior angle of a regular polygon is 90°, how many sides does it have?

9

If the measure of any exterior angle of a regular polygon is 40°, how many sides does it have?

20°

What is the measure of ONE exterior angle of a regular 18-gon?

45°

What is the measure of ONE exterior angle of a regular octagon?

162°

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

135°

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

72°

What is the measure of any exterior angle of a regular polygon with 5 sides?

40°

What is the measure of any exterior angle of a regular polygon with 9 sides?

360°

What is the sum of the exterior angles of an octagon?

900°

What is the sum of the interior angles of a heptagon?

720°

What is the sum of the interior angles of a hexagon?

1080°

What is the sum of the interior angles of an octagon?

2880°

What is the sum of the measures of the interior angles of am 18-gon?

1620°

What is the sum of the measures of the interior angles of an 11-gon?