Angles of Polygons

Find the value of X.

• 100
• 120
• 125
• 130

What is the measure of ONE interior angle in a regular triangle (3 sides)?

• 15°
• 30°
• 60°
• 90°

What is the formula for the sum of the interior?

• S=360
• S=(n-2)180
• n=360/ext. angle
• 1 int. angle + 1 ext. angle=180

What is the sum of exterior angles of a pentagon?

• 180
• 360
• 540
• 760

The sum of the interior angles of a polygon is 1620°.  How many sides does the polygon have?

• 8
• 11
• 3
• 16

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

• 1440°
• 900°
• 1080°
• 1260°

What is the SUM of the angle measures in a hexagon (6 sides)?

• 720°
• 1080°
• 600°
• 540°

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

• 60°
• 80°
• 108°
• 120°

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

• 720°

• 900°

• 1080°

• 1260°

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

• 180

• 360

• 3240

• 162