Reflections

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a shape over a line, creating a mirror image.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the line of reflection?

Back

The line of reflection is the line over which a shape is flipped to create its reflection.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How do you reflect a point over the y-axis?

Back

To reflect a point (x, y) over the y-axis, change the sign of the x-coordinate to (-x, y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How do you reflect a point over the x-axis?

Back

To reflect a point (x, y) over the x-axis, change the sign of the y-coordinate to (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (3, 4) over the y-axis?

Back

The reflection is (-3, 4).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (-2, -5) over the x-axis?

Back

The reflection is (-2, 5).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a shape is reflected over the x-axis, how does its orientation change?

Back

The shape's orientation is flipped vertically.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a shape is reflected over the y-axis, how does its orientation change?

Back

The shape's orientation is flipped horizontally.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting the shape E over the x-axis?

Back

The result is a shape that is a mirror image of shape E across the x-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

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

Back

The x-coordinate changes sign, while the y-coordinate remains the same.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5