Understand Scale Factors and Proportions

Front

Scale factor is _________

Back

the number you multiply the original shape by in order to get the scale copy

Front

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

Back

2

Front

What is the scale factor from ΔDEF to ΔABC? Options: 1/2, 7/3, 2, 10/3

Back

1/2

Front

A map says that 2 in represents 16 miles. What is the distance on the map (in inches) that represents the actual distance of 40 miles?

Back

5 inches

Front

The scale on a map says that 3 cm represents 12 km. What is the actual number of km represented by 5 cm on the map?

Back

20 km

Front

On a map, Memphis, Tennessee, and Jackson, Mississippi, are 5 inches apart. The distance between the cities is actually 210 miles. What scale was used to create the map?

Back

1 inch = 42 miles

Front

Is Figure B a scaled copy of Figure A?

Back

Yes

Front

What is the scale factor?

Back

4

Front

On a map, the distance between Louisville, Kentucky, and Nashville, Tennessee, is 1 3/4 inches. The scale of the map is 1 in:100 mi. What is the actual distance between the two cities?

Back

175 miles

Front

The original perimeter of a rectangle is 30cm, if we enlarge it by a scale factor of 4 what is the new perimeter?

Back

120