Perimeter and Area with Scale Factors

Triangle F is the original drawing. Which triangle has a perimeter that is half as long as F?

• B

• G

• H

Rectangle A measures 12 inches by 6 inches. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that could be the dimensions of Rectangle B.

• 3 inches by 1.5 inches

• 7 inches by 3 inches

• 24 inches by 18 inches

• 60 inches by 30 inches

By what scale factor is the perimeter of a figure effected by when it is dilated or shrunk?

• sf^1

• sf^2

• sf^3

By what scale factor is the area of a figure effected by when it is shrunk or dilated?

• sf^1

• sf^2

• sf^3

How is the perimeter of a figure effected when all of its sides are increased by a factor of 3?

• The perimeter is 9 times larger

• The perimeter is 3 times larger

• The perimeter is 27 times larger

How is the area of a figure effected if it is shrunk by a factor of 1/2?

• It becomes 1/4 times smaller

• it becomes 1/2 times smaller

• it becomes 1/8 times smaller

If the scale factor is 5, how times larger will the area of the big square be compared to the smaller square?

• 5

• 20

• 25

The area of the larger square is __________ times larger than the area of the smaller square.

• 1/2

• 1

• 2

• 4

The perimeter of the square increased by a scale of 5.

• True

• False

The perimeter of the larger square is 2 times larger than the smaller square.

• True

• False