Dilation / Scale Factor

Front

What is dilation in geometry?

Back

Dilation is a transformation that alters the size of a figure but maintains its shape, using a scale factor.

Tags

CCSS.8.G.A.3

Front

What is a scale factor?

Back

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

Tags

CCSS.8.G.A.3

Front

What mathematical operation is used with the scale factor in a dilation?

Back

Multiplication.

Tags

CCSS.8.G.A.3

Front

How do dilations affect the angles of a polygon?

Back

Dilations do not change the angles.

Tags

CCSS.8.G.A.3

Front

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

Back

The figure enlarges.

Tags

CCSS.8.G.A.3

Front

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

Back

The figure reduces in size.

Tags

CCSS.8.G.A.3

Front

What is the scale factor if triangle ABC is dilated to triangle XYZ with sides in the ratio 2:3?

Back

Tags

CCSS.8.G.A.3

Front

True or False: A scale factor of 1/2 reduces a figure.

Back

True.

Tags

CCSS.8.G.A.3

Front

If triangle ABC is dilated to triangle XYZ and XYZ is larger, what can we say about the scale factor?

Back

The scale factor is greater than 1.

Tags

CCSS.8.G.A.3

Front

If triangle ABC is dilated to triangle XYZ and XYZ is smaller, what can we say about the scale factor?

Back

The scale factor is less than 1.

Tags

CCSS.8.G.A.3