Polygons and Quadrilaterals PreAssessment

Find the interior angle sum for the polygon shown in the diagram.

• 1080

• 540

• 900

• 360

Find the measure of ONE exterior angle of a regular decagon.

• 36
• 10
• 18
• 40

Find the measure of ONE interior angle of a regular dodecagon.

• 150
• 120
• 1800
• 20

The sum of the interior angles of a polygon is __________________ where n is the number of sides.

• (n - 2)180
• (n - 1)180
• 360
• (n - 3)(180)

The sum of the exterior angles of a polygon is __________________ where n is the number of sides.

• 360
• n
• (n - 2)180
• (n - 1)180

Solve for x. 

• 100
• 120
• 125
• 130

Find the measure of one exterior angle in the regular polygon. Round your answer to the nearest tenth if necessary.

• 32.7⁰

• 90⁰

• 45⁰

• 60⁰

What is the sum of the measures of the exterior angles of a decagon?

• 1440⁰

• 360⁰

• 144⁰

• 1800⁰

Which of these properties is true of a concave polygon?

• All of its internal angles are 180 degrees at most.

• All the vertices are pointing outward.

• One or more of its internal angles are more than 180 degrees.

• All its internal angles are more than 180 degrees.

Classify the type of polygon, if it's irregular/regular and concave/convex.

• Hexagon irregular concave

• Heptagon irregular convex

• Hexagon irregular convex

• Octagon irregular concave