Find Sum of Polygons

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

• 1440°

• 900°

• 1080°

• 1260°

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

• 180

• 360

• (n-2)180

• n(n-3)/2

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

• 3960

• 360

• 15

• 4280

What is the exterior angle sum of ALL polygons?

• ^90o

• 180^o

• 270^o

• 360^o

What is the sum of all angles?

• 144

• 1800

• 1440

• 12

Find the value of X.

• 60

• 120

• 85

• 55

Calculate the sum of the interior angle measures of a polygon with 25 sides.

• 360 degrees

• 4500 degrees

• 335 degrees

• 4140 degrees

What is the sum of the exterior angles of a 20-gon?

• 180

• 360

• 3240

• 162

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

• 1800

• 1080

• 1620

• 1260

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