Interior Angles of Polygon

What is the measure of ONE interior angle in a regular pentagon (5-sides)?

• 90°

• 108°

• 120°

• 180°

Which formula is used to find the sum of the interior angles of a polygon?

• 180

• 360

• (n-2)180

• n(n-3)/2

Find angle x

• 156^o

• 125^o

• 170^o

• 80^o

Find angle x

• 136^o

• 226^o

• 316^o

• 91^o

What is the sum of the interior angles?

Mathematical Equivalence

ON

Where is the interior angle of the hexagon?

Find the interior angle sum for each polygon. Round your answer to the nearest tenth if necessary.

• A

• B

• C

• D

Find the measure of angle E.

• 9

• 97°

• 48°

• 79°

Find the value of y in polygon JKLM.

• 25

• 22.5

• 180

• 11.25

Find the value of X.

• 100° 

• 110° 

• 150° 

• 168°