Interior & exterior angles of a Polygon

If the sum of the interior angles of a polygon is 1800°, how many sides does it have?

• 10 sides/ Decagon

• 8 sides/ Octagon

• 12 sides/ 12-gon

• 11 sides/ 11-gon

What the measure of the missing angle X?

• 121

• 112

• 211

What is the measure of each exterior angle of a regular decagon (10 sides) ?

• 63

• 36

• 360

• 10

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

• 1440°

• 1080°

• 900°

• 1260°

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

• 90°

• 120°

• 108°

• 180°

What is the measure of ONE interior angle in a regular hexagon (6 sides)?

• 60°

• 108°

• 80°

• 120°

Find the angle sum of the interior angles of the polygon.

• 180°

• 720°

• 540°

• 1080°

What is the name of a 11 sided polygon?

• octagon

• heptagon

• undecagon

• dodecagon

Find the missing angle.

• 75

• 100

• 85

• 45

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

• 160°

• 20°

• 360°

• 2280°