CH9 Review

The measure of an interior angle of a regular polygon is 171^o . How many sides does this polygon have?

• 18

• 20

• 9

• 40

• 24

Two of the vertices of triangle ABC are A(1,8) and B(4,12). Which of the following could be the lengths of sides AC and BC? Select all that apply.

• AC = 4, BC = 1

• AC = 4, BC = 4

• AC = 8, BC = 3

• AC = 6, BC = 2

Which of the following could be the lengths of the sides of a triangle? Select all that apply.

• 2,2,1

• 3,8,10

• 3,3,3

• 5,5,11

• 3,4,5

An isosceles triangle is __________ a right triangle.

• sometimes

• always

• never

An equilateral triangle is ____________ an acute triangle.

• always

• sometimes

• never

A scalene triangle is ____________ an obtuse triangle.

• always

• sometimes

• never

A heptagon has how many possible diagonals?

• 7

• 14

• 18

• 5

Given quadrilateral QRST with vertices Q(2,5), R(-3, 5), S(-3, -4), and T(2,-4). What type of quadrilateral best describes QRST?

• parallelogram

• trapezoid

• rectangle

• rhombus

• square

Given quadrilateral QRST with vertices Q(2,5), R(-3, 5), S(-3, -4), and T(2,-4). The perimeter of QRST is ______ units.

• 28

•  $4\sqrt{6}$  
  

• 45

• 22.5

• 14

Given quadrilateral QRST with vertices Q(2,5), R(-3, 5), S(-3, -4), and T(2,-4). The area of QRST is ______ units squared.

• 28

•  $4\sqrt{6}$  
  

• 45

• 22.5

• 14