Finding Measures of Angles in Polygons

What is the formula for finding the sum of the interior angles of a polygon?

• S_I =360
• S_I =180(n-2)
• S_I =360/n
• R_I = ((n-2)180)/n

What is the formula for the sum of the exterior angles of a polygon?

• S_E =360
• S_E =180(n-2)
• S_E=360/n
• R_E=360/n

What is the formula for finding the measure of one of the interior angles of a regular polygon?

• S_I =360
• S_I =180(n-2)
• S_I =360/n
• R_I = ((n-2)180)/n

How do you find one exterior angle of a regular polygon?

• R_E = 360
• R_E = 180(n-2)
• R_E = 360/n
• R_E = ((n-2)180)/n

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 pentagon (5-sides)?

• 90°
• 108°
• 120°
• 180°

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

• 60°
• 80°
• 108°
• 120°

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

• 45 degrees
• 360 degrees
• 1080 degrees
• 135 degrees

Find the value of x.

• 100
• 120
• 125
• 130