Dilations

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 and a center of dilation.

Tags

CCSS.8.G.A.3

Front

What is the scale factor in a dilation?

Back

The scale factor is a number that describes how much a figure is enlarged or reduced during a dilation.

Tags

CCSS.8.G.A.3

Front

If a figure is dilated by a scale factor greater than 1, what type of dilation is it?

Back

Enlargement.

Tags

CCSS.8.G.A.3

Front

If a figure is dilated by a scale factor less than 1, what type of dilation is it?

Back

Reduction.

Tags

CCSS.8.G.A.3

Front

How do you find the coordinates of a dilated point?

Back

Multiply the original coordinates by the scale factor.

Tags

CCSS.8.G.A.3

Front

What are the new coordinates of point A(2, 3) when dilated by a scale factor of 3?

Back

A'(6, 9).

Tags

CCSS.8.G.A.3

Front

What happens to the distances between points in a dilation?

Back

The distances between points are multiplied by the scale factor.

Tags

CCSS.8.G.A.3

Front

What is the center of dilation?

Back

The point about which a figure is enlarged or reduced.

Tags

CCSS.8.G.A.3

Front

If point A(4, 6) is dilated to A'(8, 12), what is the scale factor?

Back

The scale factor is 2.

Tags

CCSS.8.G.A.3

Front

What is the effect of a scale factor of 1 on a figure?

Back

The figure remains unchanged.

Tags

CCSS.8.G.A.3