Q2 W5 IA (Dilation)

Front

What is dilation in geometry?

Back

Dilation is a transformation that alters the size of a figure but not its shape, using a center of dilation and a scale factor.

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.

Front

How do you find the scale factor when given the dimensions of the original and dilated figures?

Back

Front

If a figure is dilated by a scale factor of 2, what happens to its dimensions?

Back

Each dimension of the figure is multiplied by 2, making it twice as large.

Front

What are the coordinates of a point A(2,3) after dilation by a scale factor of 3?

Back

A'(6,9) because you multiply each coordinate by 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.

Front

If a figure is dilated with a scale factor of 1/2, what happens to its size?

Back

The figure is reduced to half its original size.

Front

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

Back

It reduces the size of the figure.

Front

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

Back

It enlarges the size of the figure.

Front

How do you determine the coordinates of a dilated figure?

Back

Multiply each coordinate of the original figure by the scale factor.