Proportions With Scale Factor

If the scale factor is equal to 1, the copy is ________ the original.

• the same size as

• smaller than

• bigger than

If the scale factor is between 0 & 1, the copy is ________ the original.

• the same size as

• smaller than

• bigger than

If the scale factor is greater than 1, the copy is ________ the original.

• the same size as

• smaller than

• bigger than

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

Mathematical Equivalence

ON

The blueprint(drawing) of this house has a length of 6 inches.  The actual house has a length of 18 feet.  What is the scale used?

• 1 inch: 3 feet

• 1 inch: 6 feet

• 3 inches: 6 feet

• 3 inches: 12 feet

A drawing of a flagpole uses the scale 1 in = 4 ft. If the pole measures 12 inches in drawing, how tall is the actual pole?

• 16 feet

• 3 feet

• 48 feet

• 9 feet

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

From Denver to Chicago = 3 inches. If the scale is 1 inch = 300 miles, find the actual distance.

• 300 miles

• 1000 miles

• 900 miles

• 600 miles

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

Find missing side

• 5

• 7

• 9

• 11