7.1.2 Reflection & Rotation

Hotspot

Which letter(s) has at least one line of reflection to show symmetry?

Multiple Choice

Which point is the image of Point X when it is reflected over the y-axis?

• Point F

• Point B

• Point G

• Point C

Multiple Choice

Where would the image of Point W be after reflecting over y = x?

• Point D

• Point C

• Point A

• Point B

Match

Match each pre-image with its corresponding image after being reflected over the x-axis.

• E (-4, 0)

• F (-2, -4)

• G (-4, -8)

• H (-6, -4)

(-4, 0)

(-2, 4)

(-4, 8)

(-6, 4)

• (-4, 0)

• (-2, 4)

• (-4, 8)

• (-6, 4)

Multiple Choice

Where would the image of Point B be after reflecting over the y-axis?

• (-3, -9)

• (9, -3)

• (-9, 3)

• (3, -9)

Match

Match each pre-image with its corresponding image after being reflected over the y = -x.

• (0, 0)

• (0, -2)

• (-6, -2)

• (-6, 0)

(0, 0)

(2, 0)

(2, 6)

(0, 6)

• (0, 0)

• (2, 0)

• (2, 6)

• (0, 6)

Hotspot

Which images has at least one line of symmetry

Hotspot

Which of the following is an example of a 90° rotation.

Match

Match the following points to the rotation performed

• Point A is the image of Point B

• Point C is the image of Point B

• Point B is the image of Point D

90° counterclockwise rotation around the

90° clockwise around the origin

180° rotation around the origin

• 90° counterclockwise rotation around the

• 90° clockwise around the origin

• 180° rotation around the origin

Match

Match each rotation description with a rule applied to an ordered pair

• Rotate 180° clockwise around the origin.

• Rotate 90° clockwise around the origin.

• Rotate 270° clockwise around the origin.

(9, 4) --> (-9, -4)

(-2, 7) --> (7, 2)

(3, 5) --> (-5, 3)

• (9, 4) --> (-9, -4)

• (-2, 7) --> (7, 2)

• (3, 5) --> (-5, 3)

Multiple Choice

Are Triangles ABC and A’B’C’ congruent?

• Yes, because both triangles have the same angles.

• Yes, because both triangles are named using the same letters

• Yes, because both triangles have the same shape and size due to a rigid transformation

Draw

Sort the rules based on the rotation and direction that would produce the same result.

Multiple Choice

Which of the following coordinate points is the image after Point Y is rotated 90° clockwise?

• (-5, 7)

• (7, -5)

• (5, -7)

• (-7, 5)

Hotspot

Which letters when rotated 180° will result in the same images as the preimage?

Fill in the Blanks

On a scale of 1 to 5, where 5 means 'I completely understand' and 1 means 'I'm very confused,' how well do you feel you understand this lesson before you leave today?