Dilation & Similarity

Front

What is a proportion?

Back

An equation that states two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

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

Back

B' (8, 18)

Tags

CCSS.8.G.A.3

Front

What happens to a shape when a dilation has a scale factor greater than one?

Back

The dilation is an enlargement.

Tags

CCSS.8.G.A.3

Front

What is the rule for a dilation that doubles the size of a shape?

Back

(x, y) ----> (2x, 2y)

Tags

CCSS.8.G.A.3

Front

What is the coordinate of the image of the point (1, 2) under a dilation with center at the origin and scale factor of 3?

Back

(3, 6)

Tags

CCSS.8.G.A.3

Front

What is the definition of similarity in geometry?

Back

Two shapes are similar if they have the same shape but not necessarily the same size.

Tags

CCSS.HSG.CO.B.6

CCSS.8.G.A.2

Front

What is the scale factor in a dilation?

Back

The ratio of the length of a side of the image to the length of the corresponding side of the original figure.

Tags

CCSS.8.G.A.3

Front

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

Back

The shape is reduced in size.

Tags

CCSS.8.G.A.3

Front

What does it mean for two figures to be congruent?

Back

Two figures are congruent if they have the same size and shape.

Tags

CCSS.8.G.A.2

Front

How do you find the scale factor of a dilation?

Back

Divide the length of a side of the image by the length of the corresponding side of the original figure.

Tags

CCSS.8.G.A.3