Geom: G.CO.A.5 Guide 1/4

Reflection Basics

G.CO.A.5 Guide 1/4

Multiple Choice

What does  $$r_y\ A\left(2,4\right)$$  mean? 

• rotation around point y

• reflection over the y-axis

• translation 2 right and 4 up

• translation 2 up and 4 right

Multiple Choice

What does  $$R_{O,90\degree}\ J\left(-2,7\right)$$  mean?

• Reflect point J over line O

• Rotate point J around the origin 90 degrees clockwise

• Rotate point J around the origin 90 degrees counterclockwise

• Translate point J 2 left and 7 up

Multiple Choice

What does  $$T_{<-3,4>\ }K\ \left(-2,\ -5\right)$$   mean?

• Reflect point K over the x-axis 

• Rotate point K negative 3 degrees around point 4

• Translate Point K 3 left and 4 up

• Translate point K 2 left and 5 down

Multiple Select

Which of the following are properties of reflections? Select all that apply.

• Line of reflection is a perpendicular bisector of the segments connecting the points to their image.

• Image points are same distance from line of reflection as their preimage.

• Distances from points to their images are all equidistant.

• Orientation of image is different that orientation of preimage.

• After a reflection, all points of the image will be in a different place than the preimage.

Multiple Choice

True or False: The line of reflection will be the perpendicular bisector of the segment joining a point on the pre-image to its image point.

• True

• False

Multiple Choice

True/False: You can use patty paper to help you with reflections.

• True

• False

Multiple Choice

Point A (3,-8) is reflected over the x-axis. Point A' is located at...

• (-3,-8)

• (-8,3)

• (-3,8)

• (3,8)

Multiple Choice

Point J (-2, -4) is reflected over the y-axis. The coordinates are point J' are...

• (2,4)

• (2,-4)

• (-2,4)

• (-4,-2)

Multiple Choice

The line of reflection is the _____________ ________ of a point and its image.

• same distance

• perpendicular bisector

• right angle

• splitting image

Multiple Choice

True/False: When finding the line of reflection between a pre-image and image, you find the perpendicular bisector of the segment containing any point and its image.

• True

• False