Reflections

Front

What is a reflection?

Back

A reflection is when you flip or mirror an object across a line.

Front

Identify the transformation: Reflection across y-axis, Reflection across x-axis, 180 Rotation, Translation 2 units down.

Back

Reflection across x-axis.

Front

When you reflect a shape, you ______ over an axis or line.

Back

Flip.

Front

What is the formula for a reflection over the y-axis?

Back

(x, y) → (-x, y).

Front

Which answer shows a reflection across the y-axis? a, b, c, d

Back

d.

Front

What is the effect of reflecting a point (3, 4) over the x-axis?

Back

The reflected point is (3, -4).

Front

What is the effect of reflecting a point (-2, 5) over the y-axis?

Back

The reflected point is (2, 5).

Front

If a shape is reflected over the x-axis, what happens to its y-coordinates?

Back

The y-coordinates are inverted (multiplied by -1).

Front

What is the line of reflection?

Back

The line of reflection is the line across which a shape is flipped or mirrored.

Front

How do you determine the line of reflection for a given shape?

Back

The line of reflection is the perpendicular bisector of the segment joining each point and its image.