Geometry: Chapter 7 Quiz Review

The sum of the interior angles in a polygon is 3,240^o.  How many sides are in the polygon?

• 10
• 582,840
• 18
• 20

Which formula represents how to find the interior angle sum of any polygon?

• (number of sides - 2) x 180

• (number of sides + 2) x 180

• number of sides x 180

• number of sides x 360

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

Find the value of X.

• 100
• 120
• 125
• 130

What is the SUM of the angle measures in a triangle (3 sides)?

• 60°
• 90°
• 120°
• 180°

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

• 1440°
• 900°
• 1080°
• 1260°

What is a regular polygon?

• all side lengths are the same length

• all angles are the same (equal in measure)

• only some side lengths are the same

• all side lengths are different

• only some angles are the same

What is the formula for a particular interior angle in a regular polygon?

• 180(n−2)
• 180(n−2)÷n
• 360
• 360/n

Find the measure of angle K.

• 9

• 97°

• 48°

• 79°

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

nearest tenth if necessary.

• A

• B

• C

• D