Find the Scale Factor Proportions

The shapes are similar. What is the scale factor? Simplify your answer.

• 4:1

• 1:5

• 5:1

• 5:4

The triangles are similar. Use proportions to find the value of x.

• x = 10

• x = 100

• x = 50

• x = 200

The shapes are similar. Use proportions to find the value of x.

• x = 12 inches

• x = 7 inches

• x = 6 inches

• x = 10 inches

The shapes are similar. Use proportions to solve for y.

• y = 11 ft

• y = 4.5 ft

• y = 5 ft

• y = 6.5 ft

The shapes are similar. Use proportions to find the value of y.

• y = 30 m

• y = 25 m

• y = 10 m

• y = 32 m

The triangles are similar. Use proportions to find the value of x.

• x = 5

• x = 1

• x = 3

• x = 4

The triangles are similar. Use proportions to find the value of x.

• x = 9

• x = 2

• x = 6

• x = 3

Given triangle ABC is a dilated image of triangle JKL, the pre-image, with a scale factor of 4, which of the following proportions are true? Select all that apply.

• BC

• AC

• MD

• MC

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24