sum of interior angles of a polygon formula

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

• 1440°
• 900°
• 1080°
• 1260°

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

• 60°
• 90°
• 120°
• 180°

Find the value of X.

• 100
• 120
• 125
• 130

What is the formula for the sum of exterior angles in a polygon?

• 180(n−2)
• 180(n−2)÷n
• 360
• 360/n

What is the formula for the sum of interior angles in a polygon?

• 180(n−2)
• 180(n−2)÷n
• 360
• 360/n

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

• 180(n−2)
• 180(n−2)÷n
• 360
• 360/n

What is the sum of interior angles for a pentagon?

• 900
• 540
• 360
• 108

What is the measure of a single interior angle for a regular octagon?

• 1440
• 1080
• 1800
• 135

What is the sum of exterior angles for a 27-gon?

• 4860
• 4500
• 360
• 270

Solve for x

• 112
• 116
• 90
• 244