8.2.b: Dilations math Talk Nov 19

Front

True or False: Dilations always result in similar figures.

Back

True

Tags

CCSS.8.G.A.3

Front

A dilation is given by the transformation (x, y) → (3.5x, 3.5y). What is the scale factor?

Back

3.5

Tags

CCSS.8.G.A.3

Front

True or False: The scale factor of a dilation can be greater than 1.

Back

True

Tags

CCSS.8.G.A.3

Front

Definition: The figure before a transformation has occurred.

Back

Pre-image

Tags

CCSS.HSG.CO.A.2

Front

In a dilation what mathematical operation is used with the scale factor?

Back

Multiplication

Tags

CCSS.8.G.A.3

Front

What is a dilation in geometry?

Back

A transformation that alters the size of a figure but keeps its shape.

Tags

CCSS.8.G.A.3

Front

If the scale factor is less than 1, what happens to the figure during dilation?

Back

The figure shrinks.

Tags

CCSS.8.G.A.3

Front

If the scale factor is greater than 1, what happens to the figure during dilation?

Back

The figure enlarges.

Tags

CCSS.8.G.A.3

Front

What is the relationship between the pre-image and the image in a dilation?

Back

The image is a scaled version of the pre-image.

Tags

CCSS.8.G.A.3

Front

What does it mean for two figures to be similar?

Back

They have the same shape but may differ in size.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6