Dilations and Scale Factor Practice

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

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

If a scale factor is greater than 1, what type of transformation is it?

Back

It is an enlargement.

Tags

CCSS.8.G.A.3

Front

If a scale factor is less than 1, what type of transformation is it?

Back

It is a reduction.

Tags

CCSS.8.G.A.3

Front

How do you find the scale factor when given the coordinates of a preimage and its image?

Back

Divide the coordinates of the image by the corresponding coordinates of the preimage.

Tags

CCSS.7.G.A.1

Front

What happens to the coordinates of a point (x, y) under a dilation with scale factor k?

Back

The new coordinates become (kx, ky).

Tags

CCSS.8.G.A.3

Front

What is the image of point A(4, 6) under a dilation with scale factor 2?

Back

The image is A'(8, 12).

Tags

CCSS.8.G.A.3

Front

What is the image of point B(-10, -6) under a dilation with scale factor 1/2?

Back

The image is B'(-5, -3).

Tags

CCSS.8.G.A.3

Front

If point C(3, 4) is dilated to C'(1.5, 2), what is the scale factor?

Back

The scale factor is 0.5.

Tags

CCSS.8.G.A.3

Front

What is the relationship between similar figures and dilations?

Back

Similar figures can be obtained from one another through dilations.

Tags

CCSS.8.G.A.3