Rigid Motions vs Non Rigid Concepts

Which answer shows a reflection across the x-axis?

• d

• c

• b

• a

What is the rule for the following reflection? 

• Reflection across       y = 3

• Reflection across        x = −3

• Reflection across            x = 3

• Reflection across          y = −3

Which transformation is NOT a rigid motion (the size changes)?

• reflection

• rotation

• dilation

• translation

Does the transformation appear to be a rigid motion?

• Yes, distances are preserved.

• Yes, angle measures are preserved.

• Yes, both distances and angle measures are preserved.

• No, distances are not preserved.

Rigid motions are transformations that...

• preserve length and angle measure

• make figures bigger or smaller

• translate an image left or right

Does the transformation appear to be a rigid motion?

• Yes, it preserves the distance between corresponding points.

• No, it does not preserve the distance between corresponding points.

Triangle A is rotated 270° counterclockwise with the origin as the center of rotation to create a new figure. Which triangle shows the new location?

• A

• B

• C

• D

What axis is the triangle being reflected over?

• X-axis

• Y-axis

What rule describes the translation?

• (x - 6, y + 2)

• (x - 2, y + 6)

• (x + 2, y - 6)

• (x + 6, y - 2)

Which of the following is NOT a rigid motion?

• Rotation

• Reflection

• Translation

• Dilation