Scale Factor Similar Figures Scale Drawings

A tree is 12 feet tall and casts a shadow 9 feet long. A building nearby casts a shadow that measures 24 feet. How tall is the building? (Draw a picture, set up a proportion)

• 24 feet

• 21 feet

• 27 feet

• 32 feet

Find y.

• 144

• 18

• 72

• 12

Solve the proportion.
____ = ____

• p=31.3

• p=308

• p=924

• p=532

Review the picture. Find the missing side measurement in the picture using a proportion.

• w = 18 m

• w = 6 m

• w = 6 m

• w = 0.16 m

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

Change both measurements to the same unit of measure, and find the scale factor.
1 ft model of a 1 in. fossil 

• 12/1

• 6/1

• 18/1

• 24/1

Scale: 1in.=7ft. The actual width of the backyard is 49 ft, how wide is it in the drawing?

• 14 in 

• 7 in

• 42 in

• 56 in

Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

In similar figures, corresponding sides are ...

• Congruent

• Proportional

• The Same

• Equal

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.