Angle Sum Polygons

What is the SUM of the angle measures in a nonagon (9 sides)?

• 1440°

• 900°

• 1080°

• 1260°

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 angle measures in a triangle (3 sides)?

• 60°

• 90°

• 120°

• 180°

Tags

CCSS.8.G.A.5

Find the angle sum of the polygon.

• 720° 

• 900° 

• 1080° 

• 1260° 

• 10

• 12

• 14

• 16

Find the value of x.

• 87°

• 54°

• 101°

• 92°

Match the following to their angle sum

• 10440 degrees

• 60-gon

• 720 degrees

• 25-gon

• 900 degrees

• Heptagon

• 7200 degrees

• 42-gon

• 4140 degrees

• Hexagon

The angle sum for this shape is ​ (a)   degrees.

x = ​ (b)   degrees

• 100

• 120

• 720

• 130

• 1080

Find the value of x

• 87°

• 54°

• 101°

• 92°

Tags

CCSS.8.G.A.5

What is the value of x?

• 26.25

• 38.75

• 24

• 25.125