Scale Factor with Area and Perimeter

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.

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

• add

• subtract

• multiply

• divide

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

• True

• False

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

• 1/2

• 1

• 2

• 4

If two figures are similar, the corresponding sides are ______________.

• equal

• congruent

• proportional

• none of these

Q1. What is the height of the building?

• A) 8 ft

• B) 9 ft

• C) 12 ft

• D) 21 ft

• 0.25
• 0.5
• 2
• 1/2

To find the area of the second figure, you multiply ________________.

• length x width 

• perimeter x perimeter

• scale factor x scale factor

A rectangle has a perimeter of 15 inches. An image is created with a scale factor of 2. What is the new perimeter?

• 17

• 60

• 30

• 15

What is the scale factor used from A to B? 

• 0.5

• 3

• 5

• 10