Scale Factor

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. It is used to determine how much larger or smaller a figure is compared to another figure.

Front

If the scale factor is greater than one, what happens to the new figure?

Back

The new figure will be an enlargement.

Front

If the scale factor is less than one, what happens to the new figure?

Back

The new figure will be a reduction.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but not necessarily the same size, and their corresponding sides are proportional.

Front

How do you find the actual size of an object from a model using scale?

Back

Multiply the measurements of the model by the scale factor to find the actual size.

Front

What is the scale factor if a model is 1 inch = 4 feet?

Back

The scale factor is 4.

Front

If a figure is enlarged by a scale factor of 3, how does its area change?

Back

The area increases by a factor of 3^2, or 9 times.

Front

What is a scaled copy?

Back

A scaled copy is a figure that is similar to another figure, created by enlarging or reducing it using a scale factor.

Front

If Figure A has a scale factor of 2 to Figure B, what is the relationship between their areas?

Back

The area of Figure B is 4 times the area of Figure A.

Front

What is the scale factor from a small fry measuring 2 inches to a large fry measuring 6 inches?

Back

The scale factor is 3.