Sum of Polygon Interior 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 a 27-gon?

• 4860

• 4500

• 3700

• 2700

What is the sum of interior angles for an octagon?

• 1440

• 1080

• 1800

• 135

Solve for x

• 94

• 25

• 36

• 180

Find the value of X.

• 100° 

• 110° 

• 150° 

• 168° 

Find the sum of the interior angles for the polygon.

Use the formula (n-2)180 to find the sum of the interior angles of this polygon.

• 180 degrees

• 360 degrees

• 540 degrees

• 720 degrees

To find a missing angle of a polygon first find the sum of all the angles then subtract the angles you know. A pentagon has 540 degrees and the sum of the interior angles I know is 428 degrees to get the missing angle subtract.

• 112 degrees

• 180 degrees

• 428 degrees

• 540 degrees

Find the value of X.

• 100

• 120

• 125

• 130