Similar Figures & Scale Factor

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24

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

• reduction

• enlargement

• scale

• not proportional

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

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

What is the scale factor from the large triangle to the small triangle?

• 1/2

• 2/3

• 3/4

• 2

What is the Scale Factor from the small fry (original) to the large fry (new)?

• 1/3

• 48

• 4

• 3

 Find the scale factor (k)

(in simpliest form).

Are the two figures similar?

• Yes

• No

Are the following similar? Why or why not?

• Yes

• No, the corresponding angles are not equal.

• No, the ratios of the corresponding sides are not equal.

Are these figures similar? Why or why not?

• Yes, their shapes are the same

• No, their corresponding sides are not equal.

• No, their corresponding sides are not proportional.

• Yes, their corresponding sides are proportional