Dilations Review

Front

What is a dilation in geometry?

Back

A transformation that produces an image that is the same shape as the original, but is a different size.

Front

What is the center of dilation?

Back

The fixed point in a dilation from which all points are expanded or contracted.

Front

What does a scale factor greater than 1 indicate?

Back

An enlargement of the figure.

Front

What does a scale factor less than 1 indicate?

Back

A reduction of the figure.

Front

How do you calculate the coordinates of a dilated figure?

Back

Multiply the original coordinates by the scale factor.

Front

If the original coordinates are (2, 3) and the scale factor is 2, what are the new coordinates?

Back

(4, 6) because (2*2, 3*2) = (4, 6).

Front

True or False: A dilation changes the shape of the figure.

Back

False, a dilation preserves the shape.

Front

What is the scale factor if the original length is 4 and the new length is 6?

Back

1.5, because 6/4 = 1.5.

Front

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

Back

The image will be the same size as the pre-image.

Front

What is the relationship between the original figure and the dilated figure?

Back

They are similar figures, meaning they have the same shape but different sizes.