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.

Front

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

Back

It means that 1 centimeter on the drawing represents 4 feet in actual size.

Front

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

Back

Multiply the measurement on the scale drawing by the scale factor.

Front

What is the actual length of a car that measures 3 cm in a scale drawing with a scale of 1 cm:4 ft?

Back

12 feet.

Front

What is the formula to find the scale factor between two similar figures?

Back

Scale Factor = Length of the image / Length of the original.

Front

If the scale factor from shape A to shape B is 2/3, what does this indicate?

Back

Shape B is 2/3 the size of shape A.

Front

What is the scale factor if a small shape is enlarged to a big shape and the scale factor is 2?

Back

The big shape is twice the size of the small shape.

Front

What is the relationship between scale factor and area?

Back

The area of similar figures is proportional to the square of the scale factor.

Front

How do you find the scale factor when given the dimensions of two similar figures?

Back

Divide the corresponding dimensions of the two figures.

Front

What is the significance of a scale factor of 1?

Back

A scale factor of 1 means the two figures are the same size.