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Chapter 7 Review: MC

| 15 Questions

1

2 pts

Given that x/y = 3/5 determine which proportion is NOT equivalent.

A x/3 = y/5

B 3x = 5y

C y/x = 5/3

2

5 pts

Determine the similarity ratio given STUV~XYZW, TS=21, XY=35, WZ=20

A 21:20

B 3:5

C 5:3

3

5 pts

The area of a rectangle is 1500. The ratio of the length to width is 3:5. What is the length?

A 50

B 25

C 30

D 100

4

2 pts

What is the image of (3, 4) dilated about the origin with a scale factor of 2.

A (3/2, 2)

B (5, 6)

C (6, 8)

5

2 pts

What is the rule for a dilation about the origin with scale factor 1/3.

A (x,y) -> (1/3x, 1/3y)

B (x,y) -> (3x, 3y)

C (x,y) -> (3+x, 3+y)

6

5 pts

True/False: All parallelograms are similar.

A True

B False

7

5 pts

True/False: All isosceles triangles are similar.

A True

B False

8

10 pts

Always/Sometimes/Never: Equilateral triangles are _____________________ similar.

A Always

B Sometimes

C Never

9

10 pts

Ms. Matta is reading a map with a scale of 1 inch = 40 miles. She measures about
3.1 inches between Greenville and Yorktown. What is the actual distance between
the cities?

A 12.9 miles

B 124 miles

C 78.6 miles

10

10 pts

On a sunny day, a 12 in umbrella casts a shadow that is 2.4 ft long. A nearby
tree casts a shadow that is 40 ft long. How tall is the tree?

A 16.67 ft

B 200 ft

C 16.67 inches

D 300 inches

11

10 pts

Solve for x.

A 6

B 6 or 7

C 7

D 8

12

10 pts

Dilate (3,4) about the point (-3,1) with a scale factor of 2. What is the image of A?

A (3/2, 2)

B (6,8)

C (9,7)

13

10 pts

The altitude, XR , to the hypotenuse of right ∆WXY divides the hypotenuse into
segments that are 12 and 10 cm long. Find the length of the altitude.

A 8

B 1.2

C 8.9

14

1 pt

Which of the following is NOT a way to prove triangles are similar.

A SAS

B AA

C HL

D SSS

15

1 pt

If the scale factor of a certain dilation is 5/4, then the dilation was a _________________.

A Reduction

B Enlargement

C

D

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