Dilations

Front

Definition: The figure after a transformation has occurred.

Back

Image

Front

Triangle ABC has vertices A (-2, 2), B (2, 4) and C (3, -1). What are the coordinates of A' after a dilation by a scale factor of 2.5?

Back

(-5, 5)

Front

Definition: The figure before a transformation has occurred.

Back

Pre-image

Front

How do you write the algebraic notation when the scale factor is 3?

Back

(x, y) goes to (3x, 3y)

Front

A dilation is which of the following?

Back

Either an enlargement or a reduction

Front

What is the scale factor in a dilation?

Back

The ratio of the distance from the center of dilation to a point and the distance from the center of dilation to its image.

Front

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

Back

The figure remains unchanged.

Front

What is the center of dilation?

Back

A fixed point in the plane about which all points are expanded or contracted.

Front

If a triangle is dilated by a scale factor of 0.5, what type of transformation occurs?

Back

Reduction

Front

What happens to the coordinates of a point (x, y) when it is dilated by a scale factor of k?

Back

The new coordinates are (kx, ky).