Finding Missing Angles in Polygons

Find the value of X.

• 100
• 120
• 125
• 130

Find the missing angle.

• 75
• 85
• 100
• 45

Tags

CCSS.HSG.C.A.3

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

• 15°
• 30°
• 60°
• 90°

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

• 60°
• 80°
• 108°
• 120°

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

What is the measure of each interior angle of a regular octagon?

• 135
• 180
• 145
• 190

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

• 8
• 11
• 3
• 16

The sum of the interior angles of a polygon is 3960°. How many sides does the polygon have?

• 12
• 24
• 25
• 13

Solve for X

• 27
• 72
• 80
• 14