Similar Shapes, Scale Factors, and Missing Side Lengths - 6

Front

What are similar shapes?

Back

Shapes that have the same shape, but not necessarily the same size.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

What is a scale factor?

Back

A number that scales, or multiplies, a quantity.

Tags

CCSS.7.G.A.1

Front

If two shapes are similar, what can be said about their corresponding angles?

Back

Their corresponding angles are equal.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

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

Back

The figure gets larger.

Tags

CCSS.8.G.A.3

Front

How do you find the length of a missing side in similar shapes?

Back

Use the ratio of the corresponding sides and the scale factor.

Front

What is the scale factor if the length of a side in shape A is 4 and the corresponding side in shape B is 8?

Back

The scale factor is 2.

Tags

CCSS.7.G.A.1

Front

If triangle ABC is similar to triangle DEF, and the length of side AB is 10 and side DE is 5, what is the scale factor?

Back

The scale factor is 0.5.

Tags

CCSS.HSG.SRT.A.2

Front

What does it mean if a scale factor is between 0 and 1?

Back

The figure gets smaller.

Tags

CCSS.8.G.A.3

Front

If the scale factor is 3, and the length of a side in the original shape is 2, what is the length of the corresponding side in the new shape?

Back

The length is 6.

Tags

CCSS.7.G.A.1

Front

What is the relationship between the areas of two similar shapes with a scale factor of k?

Back

The area ratio is k^2.