# Chapter 7 Quiz -8b

15 Questions | Total Attempts: 55  Settings  • 1.
Selena is painting an image on a piece of art canvas. The image she is reproducing is 4 inches by 6 inches. She enlarges the dimensions 3 times. Which of the following statements is NOT true?
• A.

The perimeter of the original image and the perimeter of the new image are related by a scale factor of 3.

• B.

The perimeter of the original image is 1/3 the perimeter of the new image.

• C.

The area of the new image is 3 times the size of the original image.

• D.

The area of the original image and the area of the new image are related by a scale factor of 9.

• 2.
Bill is 72 inches tall and casts a 60 inch shadow. His son, who is standing next to him, casts a 50 inch shadow. How tall is his son?
• A.

60 in.

• B.

86 in.

• C.

68 in.

• D.

41.7 in.

• 3.
Which of the following statements is not true if triangle JKL is congruent to triangle RST?
• A.

JK ≅ RS

• B.

KL ≅ ST

• C.

∠K ≅ ∠T

• D.

∠J ≅ ∠R

• 4.
Write a proportion comparing the rise to the run for each of the similar slope triangles and find the numeric value.
• A.

-1/2

• B.

1/2

• C.

2

• D.

-2

• 5.
Determine whether the triangles are similar. If not, explain why not.
• A.

No, a = 30

• B.

Yes

• C.

No, b = 110

• D.

No, b = 40

• 6.
The two triangles shown in the figure are similar. Find the distance d across the river.
• A.

16 m.

• B.

81 m.

• C.

18 m.

• D.

25 m.

• 7.
Write a proportion comparing the rise to the run for each of the similar slope triangles and find the numeric value.
• A.

1/2

• B.

2

• C.

-1/2

• D.

-2

• 8.
The figures shown are similar. Find the perimeter of the second figure.
• A.

25.2 mm

• B.

14.6 mm

• C.

16.8 mm

• D.

10.8 mm

• 9.
A lakefront building that is 40 feet high casts a shadow on the water. How long is that shadow if a 18-foot high truck parked nearby casts an 9-foot shadow?
• A.

14 ft.

• B.

18 ft.

• C.

17 ft.

• D.

20 ft.

• 10.
Find the value of x in the similar polygons below.
• A.

15 ft.

• B.

6 ft.

• C.

3 ft.

• D.

9 ft.

• 11.
Triangle ABC ~ DEF. Each side of Δ ABC is 3/2 times longer than the corresponding sides of Δ DEF. If the perimeter of Δ ABC is 36 centimeters, what is the perimeter of Δ DEF?
• A.

54 cm

• B.

12 cm

• C.

24 cm

• D.

72 cm

• 12.
Which pair of polygons is not similar?
• A.

Option 1

• B.

Option 2

• C.

Option 3

• 13.
Determine if the two figures are similar by using transformations.
• A.

Similar; a reflection and a dilation map one figure onto the other.

• B.

The figures are not similar.

• C.

Similar; a translation and a dilation map one figure onto the other.

• D.

Similar; a rotation and a dilation map one figure onto the other.

• 14.
Determine if the two figures are similar by using transformations.
• A.

Similar; a reflection and a dilation map one figure onto the other.

• B.

Similar; a rotation and a dilation map one figure onto the other.

• C.

The figures are not similar.

• D.

Similar; a translation and a dilation map one figure onto the other.

• 15.
Two rectangles are similar. The length and width of the first rectangle is 3 meters by 5 meters. The second rectangle is similar by a scale factor 4. What is the area of the second rectangle?
• A.

60 m2

• B.

240 m2

• C.

64 m2

• D.

256 m2 Back to top