Angles in Polygons

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 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°

Find the value of X

• 94

• 25

• 36

• 180

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

• 90°

• 108°

• 120°

• 180°

The measures of one angle of a regular polygon is 140^o.  What is the name of the polygon? (Hint: Solve for n)

• Decagon

• Nonagon

• Heptagon

• Hexagon

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

• 60°

• 80°

• 108°

• 120°

What is the SUM of the angle measures in a triangle (3 sides)?

• 60°

• 90°

• 120°

• 180°

What is the SUM of the INTERIOR angles of a 12-gon?

• 3600

• 1800

• 2160

• 12

What is the measure of one INTERIOR angle of a regular octagon?

• 60

• 45

• 1080

• 135