Scale factor flashcard.

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

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

Back

The figure becomes larger.

Front

What happens to a figure when the scale factor is less than 1?

Back

The figure becomes smaller.

Front

If a figure has a scale factor of 2, what does that mean?

Back

Each side of the figure is twice as long as the corresponding side of the original figure.

Front

What is a similar figure?

Back

A similar figure has the same shape as another figure but may be a different size.

Front

What does it mean for two triangles to be similar?

Back

It means that their corresponding angles are equal and their corresponding sides are in proportion.

Front

If triangle ABC is similar to triangle DEF, what can we say about their angles?

Back

Angle A = Angle D, Angle B = Angle E, Angle C = Angle F.

Front

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

Back

Divide the length of a side of the larger figure by the length of the corresponding side of the smaller figure.

Front

If the scale factor is 3, what is the ratio of the areas of the two figures?

Back

The ratio of the areas is 3^2 = 9.

Front

What is the scale factor if a figure is reduced to half its size?

Back

The scale factor is 1/2.