Scale Factor and Scale Drawings

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

Tags

CCSS.7.G.A.1

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

Tags

CCSS.7.G.A.1

The two rectangles are scale drawings. What is the measurement of x?

• 21

• 1.25

• 20

• 4

Tags

CCSS.7.G.A.1

Robbie made a scale drawing of a neighborhood park. A soccer field in the park is 14 inches long in the drawing. The actual field is 98 yards long.  What is the scale factor?

• 1 inch = 1372 yds

• 1 in =5 yds

• 1 in = 14 yds

• 1 in. = 7 yds

Tags

CCSS.7.G.A.1

Which rule would dilate shows a scale factor of 4

• (x, y) → (y, x)

• (x, y) → (x + 4, y + 4)

• (x, y) → (x, -y)

• (x, y) → (4x, 4y)

Tags

CCSS.HSG.CO.A.2

Match the following dilations by a scale factor of 1/2.

• (5,1)

• (6,8)

• (-3, -4)

• (0, -10)

• (3,4)

• (10,2)

• (0, -5)

• (-6,-8)

• (0,0)

• (0,0)

Answer explanation

Note that 0/2 is still 0

so (0,0) dilated by 1/2 is still at (0,0)

(0,-10) dilated by a 1/2 is at

(0, -5)

Tags

CCSS.8.G.A.3

If the scale factor is 4, what is the measurement of x?

• 20 m

• 24 m

• 16 m

• 4 m

Tags

CCSS.7.G.A.1

A flagpole and a model flag pole have a scale factor of 1 in.= 4 ft. If the model pole measures 12 inches, how tall is the actual pole?

• 16 feet

• 3 feet

• 48 feet

• 9 feet

Tags

CCSS.7.G.A.1

What is the scale factor?

• 1/2

• 7/3

• 2

• 10/3

Tags

CCSS.7.G.A.1

An architect is drawing a house and decides that 1.5 inches = 2 feet in his drawing. In real life the living room has a length of 17 feet. How long will the length of the room be on his blueprint (drawing)?

• 12.75 inches

• 15.5 inches

• 22.67 inches

• 51 inches

Tags

CCSS.7.G.A.1