Interior Exterior Angles of Polygons

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

• 1440°

• 900°

• 1080°

• 1260°

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

• 90°

• 108°

• 120°

• 180°

What is the sum of the exterior angles in a decagon?

• 10

• 360

• 36

• 1440

Find the measure of one exterior angle of a regular 18-gon.

• 160°

• 360°

• 20°

• 2280°

Find the sum of the interior angles of the polygon.

• 720°

• 900°

• 1080°

• 1260°

What is the value of x?

• 132

• 66

• 114

• 48

What is the measure of angle 2 in the parallelogram?

• 115

• 50

• 15

• 2

What is the sum of exterior angles in a polygon?

• 180(n−2)

• 180(n−2)÷n

• 360

• 360/n

What is the formula for one exterior angle in a regular polygon?

• 180(n−2)

• 180(n−2)÷n

• 360

• 360/n

What is a polygon called if the sum of its interior angles equals 1440° ?

• Octogon

• Nonagon

• Decagon

• Dodecagon