Dilations Flashcards

Front

A dilation is a type of

Back

transformation that creates scaled copies

Front

Dilating a figure means

Back

moving each of its vertices along a line that's extended from a given point

Front

The original distance from the given point to each vertex on the pre-image is

Back

multiplied by the same number to create the dilated image.

Front

A dilation involves a

Back

center of dilation and a scale factor.

Front

One strategy for dilating a figure is to measure the distance between the center of dilation and one of the pre-image points

Back

measure the distance between the center of dilation and one of the pre-image points, multiply that distance by the scale factor, then place the image point that distance away from the center of dilation along the same line

Front

One strategy for dilating a figure is to use a grid, so

Back

count the vertical and horizontal grid squares between grid squares between the center of dilation and the pre-image, multiply each value by the scale factor

Front

If the scale factor of the dilation is: Greater than 1

Back

the image will be larger than the pre-image and further from the center of dilation

Front

If the scale factor of the dilation is: Equal to 1

Back

the image will be the same size as the pre-image and just as far from the center

Front

A figure that has a scale factor equal to 1 and so the image will be the same size as the pre-image and just as far from the center is a

Back

congruent shape

Front

If the scale factor of the dilation is: Between 0-1

Back

the image will be smaller than the pre-image and closer to the center