Angle Measure in Polygons

What is the SUM of the INTERIOR angles of a 12-gon?

• 3600

• 1800

• 2160

• 12

A polygon has a sum of interior angle measures equal to 1620°. How many sides does the polygon have?

• 9

• 11

• 13

• 7

What is the SUM of the EXTERIOR angles of a hexagon?

• 360

• 120

• 60

• 720

What is the measure of one INTERIOR angle of a regular octagon?

• 60

• 45

• 1080

• 135

What is the measure of one EXTERIOR angle of a regular octagon?

• 60

• 45

• 1080

• 135

A regular polygon has an EXTERIOR angle with a measure of 60.  How many sides does it have?

• 6

• 120

• 3

• 60

What is the SUM of the angle measures in a nonagon (9 sides)?

• 1440°

• 900°

• 1080°

• 1260°

What is the sum of the measures of all the interior angles of a triangle?

• 120°

• 180°

• 240°

• 360°

What is the measure of ONE interior angle in a regular hexagon (6 sides)?

• 60°

• 80°

• 108°

• 120°

Find the value of X.

• 100

• 120

• 125

• 130