Sum of Interior Angles of Polygon

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

• 60°

• 90°

• 120°

• 180°

Find the size of angle x

• 108^o

• 120^o

• 90^o

• 144^o

Find the value of x.

• 110

• 90

• 130

• 120

If the sum of the interior angles of a polygon equals 900°, how many sides does the polygon have? 

• 7

• 9

• 10

• 12

Find the sum of the interior angles in a 15-gon

• 2000

• 2340

• 1875

• 1080

Find the sum of the interior of angles in a 12-gon

• 1800

• 1080

• 1620

• 1260

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

• A

• B

• C

• D

Find angle x

• 247^o

• 67^o

• 157^o

• 203^o

Find angle x

• 125^o

• 215^o

• 35^o

• 65^o

Find angle x

• 236^o

• 56^o

• 146^o

• 191^o