Unit 8 Polygons and Quadrilaterals

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

• A. 4860°

• B. 4500°

• C. 5220°

• D. 166.7°

If the sum of the interior angles of a polygon is 2340°, how many sides does the polygon have?

• A. 11 sides

• B. 13 sides

• C. 15 sides

• D. 16 sides

Find m∠S.

• 151

• 127

• 160

• 143

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

• 9

• 12

• 7

• 4

If the polygon shown below is a regular nonagon, what is the value of x?

• 40

• 90

• 45

• 60

Find m∠DCE.

• 56

• 48

• 62

• 44

If each interior angle of a regular polygon measures 168°, how many sides does the polygon have?

• A. 12 sides

• B. 30 sides

• C. 25 sides

• D. 15 sides

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

• A. Diagonals bisect each other

• B. Diagonals are perpendicular

• C. Diagonals are congruent

• D. Diagonals bisect opposite angles

Which of the following quadrilaterals always have diagonals that are congruent? Check all that apply.

• Rectangles

• Squares

• Parallelograms

• Rhombi

• Isosceles Trapezoids

Use parallelogram WXYZ for this question. If m∠XYZ = 68° and m∠WXZ = 71°, find m∠WZX.

• 41

• 46

• 43

• 48