Dilation Test

Front

What is the rule for a dilation with a scale factor of 3?

Back

(3x, 3y)

Front

Does a dilation produce a congruent figure?

Back

False

Front

What type of image does the rule (x, y) --> (1/2x, 1/2y) produce?

Back

Similar figure that is a reduction

Front

What is a Ratio?

Back

A comparison of two quantities

Front

What is the image of point B (4,9) under a dilation with center at the origin and scale factor of 2?

Back

B' (8, 18)

Front

What is a dilation in geometry?

Back

A transformation that alters the size of a figure but not its shape.

Front

What is the scale factor in a dilation?

Back

The ratio of the distance from the center of dilation to a point on the image and the distance from the center of dilation to the corresponding point on the original figure.

Front

If the scale factor is less than 1, what type of dilation occurs?

Back

Reduction.

Front

If the scale factor is greater than 1, what type of dilation occurs?

Back

Enlargement.

Front

What is the center of dilation?

Back

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