Math 8: 2.1-4 Review, Dilations

Front

What is the scale factor used 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 two figures are similar, what can we say about their angles?

Back

The corresponding angles of similar figures are congruent.

Front

What happens to the size of a figure when the scale factor is less than one?

Back

The figure undergoes a reduction.

Front

What is the term for the figure before a transformation occurs?

Back

Pre-image.

Front

What is the term for the figure after a transformation occurs?

Back

Image.

Front

If a scale factor is 2, what happens to the size of the figure?

Back

The figure is enlarged by a factor of 2.

Front

What is the relationship between the sides of similar figures?

Back

The corresponding sides of similar figures are in proportion.

Front

What does it mean for two polygons to be similar?

Back

Two polygons are similar if their corresponding angles are congruent and their corresponding sides are in proportion.

Front

What is a dilation in geometry?

Back

A dilation is a transformation that changes the size of a figure but not its shape.

Front

If a figure is dilated by a scale factor of -2, what happens?

Back

The figure is enlarged by a factor of 2 and reflected across the origin.