Unit 7 Review

What is a polygon?

• A closed plane figure made up of line segments
• An open plane figure made up of line segments
• A closed plane figure made up of rays
• An open plane figure made up of rays

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

A polygon with six sides is called a(n) ______________.

• hexagon
• pentagon
• decagon
• septagon

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

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Solve for x. 

• 100
• 120
• 125
• 130

Which is NOT a property of a parallelogram?

• Diagonals bisect each other
• Diagonals are congruent
• Both pairs of opposite sides are parallel
• Both pairs of opposite angles are congruent

In a parallelogram, opposite angles are ________.

• congruent
• supplementary
• consecutive
• parallel