12/16 Scale factor/Similarity

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the proportional relationship between two similar figures.

Front

If the scale factor is 4, what is the measurement of x if the original measurement is 6 m?

Back

24 m

Front

What happens to a shape when the scale factor is greater than 1?

Back

The shape undergoes an enlargement.

Front

What is the scale factor if the original triangle has a side length of 10 cm and the new triangle has a side length of 5 cm?

Back

1/2

Front

If a shape is enlarged by a scale factor of 3, what is the new length of a side that was originally 2 m?

Back

6 m

Front

What does a scale factor of 1 indicate?

Back

A scale factor of 1 indicates that the two figures are congruent, meaning they are the same size.

Front

If line CB corresponds with line RQ, what can we say about their lengths?

Back

Line CB and line RQ are proportional in length based on the scale factor.

Front

What is the scale factor from a small fry to a large fry if the small fry is 1 cm and the large fry is 3 cm?

Back

3

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.

Front

What is the effect of a scale factor less than 1 on a shape?

Back

It results in a reduction of the shape.