Dilation

Front

What is Dilation?

Back

Dilation means to enlarge or reduce a figure in a proportional manner.

Tags

CCSS.8.G.A.3

Front

What is the effect of a scale factor less than 1 in dilation?

Back

A scale factor less than 1 results in a reduction of the figure.

Tags

CCSS.8.G.A.3

Front

What is the effect of a scale factor greater than 1 in dilation?

Back

A scale factor greater than 1 results in an enlargement of the figure.

Tags

CCSS.8.G.A.3

Front

What is the coordinate of the image of the point B (-10,-6) under a dilation with center at the origin and scale factor k = 1/2?

Back

The image of point B is (-5,-3).

Tags

CCSS.8.G.A.3

Front

What is the coordinate of the image of the point (3, 6) under a dilation of scale factor 2?

Back

The image of the point (3, 6) is (6, 12).

Tags

CCSS.8.G.A.3

Front

What is a scale factor for an enlargement?

Back

A scale factor for an enlargement is any value greater than 1.

Tags

CCSS.8.G.A.3

Front

What is a scale factor for a reduction?

Back

A scale factor for a reduction is any value between 0 and 1.

Tags

CCSS.8.G.A.3

Front

If Triangle DOG has coordinates D (0,0), O (0,4), and G (1,5), what are the coordinates of O' after a dilation of scale factor 7?

Back

The coordinates of O' are (0, 28).

Tags

CCSS.8.G.A.3

Front

How do you calculate the coordinates of a point after dilation?

Back

To calculate the coordinates after dilation, multiply each coordinate of the point by the scale factor.

Tags

CCSS.8.G.A.3

Front

What is the center of dilation?

Back

The center of dilation is the fixed point in the plane about which all points are expanded or contracted.

Tags

CCSS.8.G.A.3