Sum of Interior and Exterior Angles

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 sum of interior angles for a pentagon?

• 900
• 540
• 360
• 108

What is the sum of interior angles for an octagon?

• 1440
• 1080
• 1800
• 135

What is the sum of interior angles for a 16-gon?

• 2880
• 2520
• 1600
• 157.5

Find the value of x.

• 120
• 135
• 27
• 30.6

What is the total angle measure of all three angles in a triangle?

Mathematical Equivalence

ON

The following polygon is a Regular Pentagon. Find the measure of EACH EXTERIOR angle of the polygon.

• 50°

• 55°

• 72°

• 355°

Solve for x.

• 220

• 110

• 250

• 125

Solve for x.

• 21

• 50

• 60

• 63