Unit 8 Test: Polygons & Quadrilaterals

What is the sum of the measures of the interior angles of a 27-gon?

• 4860°

• 4500°

• 5220°

• 166.7°

• none of these

Parallelogram WXYZ is pictured. If m∠XYZ = 68° find m∠WXY

(type the number answer only)

Parallelogram WXYZ is pictured.

If XZ = 8x – 18 and RZ = 2x + 5, find XR.

• XR = 19

• XR = 38

• XR = 12

• XR = 23

• none of these

A regular hexagon is shown below. Find the value of x.

*the angle is (11x + 21)°

• x = 9

• x = 8

• x = 10

• x = 11

• none of these

Which of the following properties is always true for a parallelogram?

• Diagonals bisect each other.

• Diagonals are perpendicular.

• Diagonals are congruent.

• Diagonals bisect opposite angles.

If EC = 13, find BD.

• BD = 12

• BD = 13

• BD = 21

• BD = 14

• BD = 26

Use rectangle ABCD. Find m∠ADB. m∠ADB =

write only the number answer

Use rectangle ABCD for questions 12-14. Find m∠DEC.

m∠DEC =

Write only the number answer

GDEF is a rhombus If GE = 42 and DH = 16, find GF.

Round to the nearest tenth as needed

ABCD is a square. If AC = 26, find BC.

• BC = 18.4

• BC = 20

• BC = 19.2

• BC = 24

• none of these