Interior and Exterior Angle Sum

Find the measure of an exterior angle of a 18-gon.

• 160°

• 360°

• 20°

• 2280°

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 measure of the missing angle

• 50°

• 35°

• 100°

• 55°

Tags

CCSS.8.G.A.5

Find the measure of the missing angle

• 95

• 85

• 35

• 45

Tags

CCSS.8.G.A.5

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

The sum of the interior angles in a polygon is 3,240^o.  How many sides are in the polygon?

• 10

• 582,840

• 18

• 20

What is the sum of the interior angles of the nonagon shown?

• 720° 

• 900° 

• 1080° 

• 1260° 

The sum of the exterior angles of a polygon is __________________ where n is the number of sides.

• 360

• n

• (n - 2)180

• (n - 1)180

Find the value of X.

• 60

• 120

• 85

• 55