Scale Factors

Front

What is the scale factor?

Back

The scale factor is a number that scales, or multiplies, some quantity. It is used to determine how much larger or smaller a figure is compared to the original.

Front

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

Back

The new figure will be an enlargement.

Front

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

Back

The new figure will be a reduction.

Front

What is the scale factor if the original length is 20 and the new length is 30?

Back

The scale factor is 1.5.

Front

What is the scale factor if the original length is 40 and the new length is 10?

Back

The scale factor is 0.25, indicating a reduction.

Front

If the scale factor is 4/5, what type of transformation occurs?

Back

Reduction.

Front

What is the scale factor if the original area is 100 square units and the new area is 225 square units?

Back

The scale factor is 1.5, since area scales with the square of the linear scale factor.

Front

How do you calculate the scale factor?

Back

Divide the new measurement by the original measurement.

Front

If a shape is enlarged by a scale factor of 3, what is the relationship between the original and new area?

Back

The new area will be 9 times the original area.

Front

What is the scale factor if the original perimeter is 50 and the new perimeter is 100?

Back

The scale factor is 2.