Reflections

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 line of reflection?

Back

The line over which a figure is reflected, such as the x-axis or y-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the rule for reflecting a point (x, y) over the y-axis?

Back

The reflected point is (-x, y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the rule for reflecting a point (x, y) over the x-axis?

Back

The reflected point is (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the rule for reflecting a point (x, y) over the line y = x?

Back

The reflected point is (y, x).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the rule for reflecting a point (x, y) over the line y = -x?

Back

The reflected point is (-y, -x).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a point (3, 4) is reflected over the y-axis, what is the new point?

Back

(-3, 4).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a point (-2, 5) is reflected over the x-axis, what is the new point?

Back

(-2, -5).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting the point (1, -3) over the line y = -x?

Back

(-3, -1).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting the point (4, 2) over the line y = 1?

Back

(4, 0).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5