Geometry Reflections

Front

What is a reflection in geometry?

Back

A reflection is 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

Does a reflection represent a rigid motion?

Back

Yes, a reflection is a rigid motion because it preserves the shape and size of the figure.

Tags

CCSS.HSG.CO.B.6

Front

What is the line of reflection?

Back

The line of reflection is the line over which a figure is reflected, creating a mirror image.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What happens to the coordinates of a point (x, y) when reflected over the x-axis?

Back

The coordinates become (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What happens to the coordinates of a point (x, y) when reflected over the y-axis?

Back

The coordinates become (-x, y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting the point (3, 4) over the x-axis?

Back

The result is (3, -4).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting the point (-2, 5) over the y-axis?

Back

The result is (2, 5).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

Identify the transformation: (x, y) --> (-x, y).

Back

This transformation is a reflection over the y-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

Identify the transformation: (x, y) --> (x, -y).

Back

This transformation is a reflection over the x-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (1, 2) across the line y = 1?

Back

The reflection is (1, 0).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5