Scale Factor Quiz 2 - Assessment

1.

Multiple Choice

30 sec

1 pt

Scale factor is the number that you _______ to calculate the new dimension.

add

subtract

multiply

divide

2.

Multiple Choice

30 sec

1 pt

If the linear scale factor is 4, what is the area scale factor?

2

8

16

25

3.

Multiple Choice

30 sec

1 pt

A scale factor of 1/2 is used to change the dimensions of a rectangle with a length of 7 centimeters and a width of 5 centimeters. What is the perimeter of the resulting rectangle?

12

35

24

38

4.

Multiple Select

30 sec

1 pt

Which of the following are 2-dimensional measurements? Select all that apply.

Length of rope

Volume of a cylinder

Area of a square

Area of a triangle

Perimeter of a rectangle

5.

Multiple Choice

30 sec

1 pt

A scale factor of 2 is used to enlarge the dimensions of a square. What is the effect of this change on the area of the square?

The area will be half as big.

The area will be twice as large.

The area will be 4 times larger.

The area will be 8 times larger.

The area will not change.

6.

Multiple Choice

30 sec

1 pt

The dimensions of a rectangular photo are 3.5 in. x 5 in. The dimensions of the photo are enlarged by a scale factor of 2.5. What is the perimeter of the new photo?

17.7 in²

8.75 in. X 12.5 in.

42.5 in.

There is not enough information.

7.

Multiple Choice

30 sec

1 pt

Two shapes are ___________ if their corresponding sides are proportional and their corresponding angles are congruent.

Similar

Ratio

Scale factor

Not similar

8.

Multiple Choice

30 sec

1 pt

Angle Angle Criterion for Triangles: If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are ___________________.

similar

cousins

triangles

360 degrees

9.

Multiple Choice

30 sec

1 pt

These two triangles are

similar

not similar

not enough information

10.

Multiple Choice

30 sec

1 pt

Stefano holds up an 8-inch pencil 32 inches from his eye. The pencil fills the image of a sculpture that is 40 feet away. How tall is the sculpture?

10

8

22

14

16

11.

Multiple Select

30 sec

1 pt

What will be true about this rectangle if you use a scale factor of 1/2 to change the dimensions? Select all that apply.

The new length is 16 in.

The new perimeter is 11 in.

The new perimeter is 21 in.

The new width is 1.5 in.

The new length is 4 in.

12.

Multiple Select

30 sec

1 pt

Which of the following are 1-dimensional measurements? Select all that apply.

Length of rope

Volume of a cylinder

Area of a square

Area of a triangle

Perimeter of a rectangle

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