Transformations Review

Front

What is a 180 degree rotation in coordinate geometry?

Back

A transformation that turns a figure around a point (usually the origin) by 180 degrees, resulting in the coordinates changing from (x, y) to (-x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the scale factor in dilation?

Back

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

Tags

CCSS.8.G.A.3

Front

What is the rule for rotating a point 270° counterclockwise?

Back

The transformation rule is (x,y)→(y, -x).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What does it mean for an image to be dilated?

Back

Dilation is a transformation that alters the size of a figure but not its shape, using a scale factor.

Tags

CCSS.8.G.A.3

Front

How do you determine if an image is reflected in the y-axis?

Back

If the x-coordinates of the points in the image are the opposite of the original points, then the image is reflected in the y-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is a reflection in geometry?

Back

A transformation that flips a figure over a line, creating a mirror image.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the difference between rotation and reflection?

Back

Rotation turns a figure around a point, while reflection flips it over a line.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the scale factor if a point (8, 12) is dilated to (2, 3)?

Back

The scale factor is ¼.

Tags

CCSS.8.G.A.3

Front

What happens to the coordinates of a point when it is reflected over the x-axis?

Back

The y-coordinate changes sign, resulting in (x, y) becoming (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the transformation rule for a 90 degree clockwise rotation?

Back

The transformation rule is (x,y)→(y, -x).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5