Area of Scale Drawings

If the scale factor is greater than one, the new figure will be

• reduction

• enlargement

• scale

• not proportional

A blueprint was using a scale of 3cm = 4.5m. Find the actual length if it is 5cm on the drawing. (Hint: simplify the scale first)

• 7.5

• 13.5

• 1.5

• 1.7

The scale of a map says that 6 cm represents 15 km.What is the actual number of kilometers that is represented by 4 cm on the map?

• 6 km

• 13 km

• 12 km

• 10 km

How does scale factor change the area?

• by the scale factor

• by the scale factor squared

• by the scale factor cubed

• scale factor does not affect the area

A rectangular park on a city map has dimensions of 1.75in x 2.1in. The park in real life is 100 times larger than the drawing. What is the area of the actual park?

• 36,750 in²

• 367.5 in²

• 3,675 in²

• 11,550 in²

The width of the parking lot is shorter than the length. The width of the actual parking lot is 48 feet. How many feet of the parking lot are represented by 1 centimeter on the scale drawing?

• 15

• 16

• 3.75

• 153.6

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

What is the scale factor from ABC to DEF?

• 2

• 3/2

• 2/3

• 1/2

A scale factor greater than one creates ....

• a reduction

• an enlargement

• an exact copy

• none of the above

A rectangular park on a city map has dimensions of 1.75in x 2.1in. The park in real life is 1,500 times larger than the drawing. What is the perimeter of the actual park?

• 5,512.5 in

• 3,675 in

• 5,250 in

• 11,550 in