Reflection

Front

What is reflection in geometry?

Back

Reflection is a transformation that flips a figure over a line, creating a mirror image of the original figure.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

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

Back

The coordinates become (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If point S(3, 7) is reflected across the y-axis, what are the new coordinates S'?

Back

S'(-3, 7).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If point K(1, 4) is reflected across the x-axis, what are the new coordinates K'?

Back

K'(1, -4).

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 figure is reflected to create its image.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a triangle has vertices A(2, 3), B(4, 5), and C(6, 7), what are the coordinates of A' after reflecting across the y-axis?

Back

A'(-2, 3).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

Which axis is used for reflection if the y-coordinates of points change signs?

Back

The x-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a point P(3, -2) is reflected across the x-axis, what are the new coordinates P'?

Back

P'(3, 2).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting a point at the origin (0, 0)?

Back

The point remains at (0, 0) because it is unchanged.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5