Geometry: Interior and Exterior Angle Sums Again

The sum of the exterior angles in a hexagon

• 360
• 180
• 720
• 540

What is a polygon called if the sum of its interior angles equals 1440° ?

• Octogon
• Nonagon
• Decagon
• Dodecagon

Find the value of X.

• 60
• 120
• 85
• 55

Find the number of sides of a polygon with one exterior angle measuring 6⁰.

• 60
• 30
• 20
• 10

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

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

The sum of the interior angles in a polygon is 3,240^o.  How many sides are in the polygon?

• 10
• 582,840
• 18
• 20

Find the sum of the interior of angles in a 12-gon

• 1800
• 1080
• 1620
• 1260

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

• 90°
• 108°
• 120°
• 180°

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

• 1440°
• 900°
• 1080°
• 1260°