Polygon Sum Conjecture

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

Find the measure of ONE interior angle of a regular dodecagon.

• 150

• 120

• 1800

• 20

Find the sum of the interior angles of a nonagon.

• 1260

• 900

• 1620

• 180

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

• 3240 degrees

• 3600 degrees

• 5400 degrees

• 3060 degrees

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

• 3960

• 360

• 15

• 4280

Find the measure of angle E.

• 9

• 97°

• 48°

• 79°

Solve for x. 

• 100

• 120

• 125

• 130

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

• 90°

• 108°

• 120°

• 180°

What is the sum of interior angles for a 27-gon?

• 4860

• 4500

• 3700

• 2700

What is the measure of a single interior angle for an equiangular octagon?

• 1440

• 1080

• 1800

• 135