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

What line is used for reflection in the x-axis?

Back

The x-axis is the horizontal line where the y-coordinate of points is inverted.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a point (x, y) is reflected over the x-axis, what are the new coordinates?

Back

The new coordinates will be (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

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

Back

The y-coordinate changes its sign.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If point A(3, 4) is reflected over the x-axis, what are the coordinates of A'?

Back

A' will be (3, -4).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the effect of reflecting a point over the y-axis?

Back

The x-coordinate of the point changes its sign.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a point (x, y) is reflected over the y-axis, what are the new coordinates?

Back

The new coordinates will be (-x, y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (2, -3) over the x-axis?

Back

The reflection is (2, 3).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How do you find the reflection of a triangle over the x-axis?

Back

Reflect each vertex of the triangle over the x-axis by changing the sign of the y-coordinates.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (-1, 2) over the y-axis?

Back

The reflection is (1, 2).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5