Translations & Reflections on the Coordinate Plane

Front

What is the algebraic representation of a reflection across the y-axis?

Back

(x, y) --> (-x, y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the image of point B(-2, 4) reflected over the x-axis?

Back

(-2, -4)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

When reflecting a point over the x-axis, which coordinate remains unchanged?

Back

x-coordinate

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What transformation does the rule (x, y) --> (-x, y) represent?

Back

Reflect over the y-axis

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What does congruency mean in geometry?

Back

Same size and shape

Tags

CCSS.8.G.A.2

Front

What is the algebraic representation of a reflection across the x-axis?

Back

(x, y) --> (x, -y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How do you determine the image of a point reflected over the y-axis?

Back

Change the sign of the x-coordinate.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the effect of reflecting a shape over the x-axis?

Back

The y-coordinates of the points are negated.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the relationship between reflections and congruency?

Back

Reflections produce congruent figures.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the definition of a transformation in geometry?

Back

A change in the position, size, or shape of a figure.

Tags

CCSS.HSG.CO.A.2