Interior Angles Sum Theorem Polygons

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

What is the sum of the interior angles for a      24-gon

• 3960

• 360

• 15

• 4280

Find the sum of the interior angle measures of a convex 20-gon.

• 3240 degrees

• 3600 degrees

• 5400 degrees

• 3060 degrees

Find the measure of one interior angle in regular 25-gon. Round your answer to the nearest tenth if necessary.

• 164.3⁰

• 167.1⁰

• 165.6⁰

• 166.7⁰

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°

Tags

CCSS.8.G.A.5

Find the value of X.

• 100° 

• 110° 

• 150° 

• 168° 

Find the sum of the interior angles for the polygon.

Find the value of x.

Tags

CCSS.8.G.A.5