Unit 4 Review

Triangle A is a scaled version of triangle B. The dimensions of triangle A are four times the dimensions of triangle B. The area of triangle A is 448 sq cm.What is the area of triangle B?

• 28 sq cm

• 112 sq cm

• 224 sq cm

• 16 sq cm

Above are two different models of the same trapezoid-shaped pool. If the area of the model on the left is 2.5 sq cm, what is the area of the model on the right?

• 10 sq ft

• 20 sq ft

• 30 sq ft

• 40 sq ft

Leah's house has a media room with a large flat-screen television to watch movies. The media room television has a width of 8 feet and a height of 4.5 feet.The flat-screen television in Leah's living room has a height of 36 inches and has the same width to height ratio as the media room television. What is the width of Leah's living room television?

• 80 in

• 20 in

• 64 in

• 48 in

How many triangles exist with the given angle measures?

32 degrees, 51 degrees, 97 degrees

• none

• exactly one

• several types

How many triangles exist with the given side lengths?

3 in, 4 in, 2 in

• none

• several

• one

How many triangles exist with the given angle measures?

40 degrees, 25 degrees, 115 degrees

• none

• one

• several

If the square pyramid shown above is sliced by a plane that is parallel to the base, which of the following is the most specific description of the cross-section of the pyramid?

• circle

• square

• triangle

• ellipse

Which types of triangles can be formed by taking the cross-section of a cube?

• isosceles and scalene only

• equilateral and isosceles only

• equilateral, isosceles, and scalene

• equilateral only

Which of the following best describes a horizontal cross-section of the cylinder above?

• square

• rectangle

• circle

• ellipse

The circumference of circle R is approximately 49.39 centimeters and the circumference of circle S is approximately 153.08 centimeters. The diameter of circle R is approximately 15.73 centimeters and the diameter of circle S is approximately 48.75 centimeters. Determine the ratio of the circumference to the diameter for circle R and for circle S.

• ratio for circle R = 6.28 and ratio for circle S = 6.28

• ratio for circle R = 3.14 and ratio for circle S = 3.14

• ratio for circle R = 3.10 and ratio for circle S = 3.10

• ratio for circle R = 5.01 and ratio for circle S = 15.53