Scale Factor

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the ratio of the dimensions of a scale drawing to the actual object.

Front

How do you find the actual length from a scale drawing?

Back

Multiply the length in the scale drawing by the scale factor.

Front

If a scale drawing has a scale of 1 cm = 4 ft, what does this mean?

Back

This means that every 1 centimeter on the drawing represents 4 feet in real life.

Front

What is the scale of a drawing if a soccer field is 14 inches long in the drawing and the actual field is 98 yards long?

Back

The scale is 1 inch = 7 yards.

Front

How do you convert inches to yards?

Back

To convert inches to yards, divide the number of inches by 36.

Front

If two cities are 3 cm apart on a map with a scale of 1 cm = 5 km, what is the actual distance?

Back

The actual distance is 15 km.

Front

What is the actual distance if the distance on the map is 4.125 inches and the scale is 2 inches = 40 miles?

Back

The actual distance is 82.5 miles.

Front

How do you calculate the scale factor from a drawing to the actual size?

Back

Divide the actual size by the size in the drawing.

Front

If a car length in a scale drawing is 3 cm and the scale is 1 cm:4 ft, what is the actual car length?

Back

The actual car length is 12 feet.

Front

What is the formula to find the scale factor?

Back

Scale Factor = Actual Size / Drawing Size.