Scale Factors and Area

A model of a house was built using the scale 5 in:25 ft. If a window in the model is 1.5 in. wide, how wide is the actual window?

• 90 ft

• 7.5 ft 

• 4.5 ft

• 45 in

A rectangle has the dimensions 4cm by 5cm. A scale factor of 3 is used to enlarge the rectangle. What is the new area?

• 20 cm²

• 60 cm²

• 180 cm²

• 100 cm²

Jamie made a scale drawing of his apartment building.  The building is 300 ft tall.  He wants his scale to be 1 inch : 10 ft.  How tall should his building be in his scale drawing?

• 25 inches

• 60 inches

• 1/30 inch

• 30 inches

A pool is 10 meters wide and 20 meters long. If I draw it at a scale of 1 cm to 2 m, how WIDE is my drawing?

• 5 cm

• 10 cm

• 20 cm

• 40 cm

What is the scale factor used to get from the small rectangle to the large rectangle?

• 4

• .25

• 21

• 5/7

Triangle PRQ is the pre-image. Triangle SUT is the image. What is the scale factor to get from the small triangle to the large triangle?

• 2

• 1.5

• .67

• 8/12

What is the area of the small triangle PQR?

• 48

• 30

• 24

• 14

If the scale factor to get from the small triangle to the large triangle is 1.5 and the area of the small rectangle is 24 units squared. What is the area of the large rectangle?

• 54

• 48

• 36

• 108

If the scale factor to get from the small rectangle to the large rectangle is 4 and the perimeter of the small rectangle is 24 units. What is the perimeter of the larger rectangle?

• 112

• 24

• 96

• 32

What is the scale factor from the smaller quadrilateral to the larger?

• scale factor = 4

• scale factor = 10

• scale factor = 3

• scale factor = 2