Scale and Scale Factor

Front

What is a scale factor?

Back

A scale factor is a number that describes how much a figure is enlarged or reduced in size. It is the ratio of the dimensions of the model to the dimensions of the actual object.

Front

How do you calculate the scale factor?

Back

To calculate the scale factor, divide the size of the model by the size of the actual object. For example, if a model is 5 inches tall and the actual object is 60 inches tall, the scale factor is 5/60 = 1/12.

Front

If a model is 12 inches tall and the actual object is 72 inches tall, what is the scale factor?

Back

1:6

Front

What does a scale of 1:12 mean?

Back

A scale of 1:12 means that 1 unit on the model represents 12 units on the actual object.

Front

What is the scale of a model that is 3 inches tall if the actual object is 9 feet tall?

Back

1:36

Front

If a model is 4 inches wide and the actual object is 12 feet wide, what is the scale?

Back

One inch = 3 feet.

Front

What is the scale factor if a doghouse is 3 feet tall and the model is 0.5 inches tall?

Back

1:72

Front

How do you convert feet to inches when calculating scale?

Back

To convert feet to inches, multiply the number of feet by 12, since there are 12 inches in a foot.

Front

If a bridge is 60 yards long and the model is 15 inches long, what is the scale?

Back

One inch = 4 yards.

Front

What is the scale factor for a flag that is 225 feet wide and a model that is 4 inches wide?

Back

1:675.