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 keeps its shape, using a scale factor.

Tags

CCSS.8.G.A.3

Front

What is a scale factor?

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 the scale factor is greater than 1, what type of transformation occurs?

Back

An enlargement occurs.

Tags

CCSS.8.G.A.3

Front

If the scale factor is less than 1, what type of transformation occurs?

Back

A reduction occurs.

Tags

CCSS.8.G.A.3

Front

What is the scale factor if a figure is enlarged from a size of 2 to a size of 6?

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 8 to a size of 4?

Back

The scale factor is 1/2.

Tags

CCSS.7.G.A.1

Front

How do you determine 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 does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but may differ in size, and their corresponding angles are equal.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

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

Back

A scale factor of 1 means the figure remains the same size; there is no change.

Tags

CCSS.8.G.A.3

Front

How do you translate a figure in a coordinate plane?

Back

To translate a figure, you add or subtract values from the x and y coordinates of each vertex.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5