Dilations and Scale Factor

Front

What is Dilation?

Back

Dilation means to enlarge or reduce.

Front

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image for A(3,3), B(6,6), C(9,3)?

Back

A'(9,9) B'(18,18) C'(27,9)

Front

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 2.

Back

(-20,-12)

Front

If AB = 3 and the scale factor is 4, then how long is A'B'?

Back

12

Front

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

Back

¼

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.

Front

If a figure is dilated by a scale factor of 1, what happens to the figure?

Back

The figure remains the same size.

Front

How do you calculate the coordinates of a dilated point?

Back

Multiply the original coordinates by the scale factor.

Front

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

Back

It enlarges the figure.

Front

What is the effect of a scale factor between 0 and 1 on a figure?

Back

It reduces the figure.