Reflections and Coordinate Plane

Coordinate Plane Reflections

Learning Target

• I can determine the effects reflections have on ordered pair coordinates.

Reflections

• Reflections flip a figure on the coordinate plane.

• Changes the orientation of a figure.

• Can be flipped across, the x-axis, y-axis, or both.

• Which axis is the triangle reflected across in the figure to the right?

Multiple Choice

Across which axis is the figure reflected?

• x-axis

• y-axis

• both axis

• neither axis

Multiple Choice

Across which axis is the figure reflected?

• x-axis

• y-axis

• neither axis

• both axis

Multiple Choice

What are the coordinates of Point Q after it is reflected across the x-axis?

• ( 1, -2 )

• ( 1, 2 )

• ( 2, 1 )

• ( -2, 1 )

Reflection Effects

• If Point B is reflected across the y-axis, what will Point B' be?

• Reflecting across the y-axis, switch the sign of the x value

• B ( 2, 3 ) -->

• B' ( -2, 3)

Reflection Effects

• If Point A is reflected across the x-axis, what will Point A' be?

• Reflecting across the x-axis, switch the sign of the y value

• A ( -4, 3 ) -->

• A' ( -4, -3)

Multiple Choice

Point T is reflected across the y-axis, what are the coordinates of Point T'?

• ( 2, 4 )

• ( 4, 2 )

• ( -2, -4 )

• ( -4, 2 )

Multiple Choice

Point Z is ( -5, -3 ), it is reflected across the y-axis. What are the coordinates of Point Z'?

• ( -5, -3 )

• ( -5, 3 )

• ( 5, 3 )

• ( 5, -3 )