Dilations and Scale Factor

Front

What is a dilation in geometry?

Back

A dilation is a transformation that alters the size of a figure but not its shape, using a scale factor.

Tags

CCSS.8.G.A.3

Front

What does scale factor mean?

Back

The scale factor is a number that scales, or multiplies, the dimensions of a figure during a dilation.

Tags

CCSS.8.G.A.3

Front

How do you determine if a dilation is an enlargement?

Back

A dilation is an enlargement if the scale factor is greater than 1.

Tags

CCSS.8.G.A.3

Front

How do you determine if a dilation is a reduction?

Back

A dilation is a reduction if the scale factor is less than 1.

Tags

CCSS.8.G.A.3

Front

If the scale factor is 2, what type of dilation is it?

Back

It is an enlargement.

Tags

CCSS.8.G.A.3

Front

If the scale factor is 1/3, what type of dilation is it?

Back

It is a reduction.

Tags

CCSS.8.G.A.3

Front

What is the scale factor if a figure is enlarged from a size of 3 to a size of 9?

Back

The scale factor is 3.

Tags

CCSS.7.G.A.1

Front

What is the scale factor if a figure is reduced from a size of 12 to a size of 4?

Back

The scale factor is 1/3.

Tags

CCSS.7.G.A.1

Front

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

Back

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

Tags

CCSS.7.G.A.1

Front

What happens to the area of a figure when it is dilated by a scale factor of k?

Back

The area is multiplied by k².

Tags

CCSS.7.G.A.1