Scale Factor

Front

What is the scale factor?

Back

The scale factor is the number you multiply by the sides of a figure to create a similar figure.

Front

If the original length is 12 units and the scale factor is 1/4, what is the size of the scale drawing?

Back

3 units.

Front

Which side corresponds to side FE in a scale drawing?

Back

ML.

Front

What is the relationship between corresponding sides in similar figures?

Back

Corresponding sides are proportional in length.

Front

If a rectangle has a length of 20 units and a scale factor of 1/2, what is the new length?

Back

10 units.

Front

What do you call the sides of similar figures that are in the same ratio?

Back

Corresponding sides.

Front

If the scale factor is greater than 1, what happens to the size of the figure?

Back

The figure enlarges.

Front

If the scale factor is less than 1, what happens to the size of the figure?

Back

The figure shrinks.

Front

What is the scale factor if a rectangle's length changes from 10 units to 5 units?

Back

1/2.

Front

How do you find the scale factor between two similar figures?

Back

Divide the length of a side of the new figure by the length of the corresponding side of the original figure.