Rotations, Dilations

If a shape is dilated, is the new image congruent or similar to its preimage?

• congruent

• similar

• 70 inches

• 20 inches

• 35 inches

• Y (8, 8), Z (8, -4), W (-4, 8)

• Y (2, 2), Z (8, -4), W (-4, 8)

• Y (2, 2), Z (2, -1), W (-1, 2)

• Y (1, 1), Z (1, -2), W (-1, 1)

A triangle with side lengths 3, 5, 7 is enlarged by a scale factor of 8. What are the side lengths of the enlarged triangle?

• 24, 40, 56

• 11, 13, 15

• 5, 3, 1

• 10, 12, 14

The fixed point around which shapes move in a circular motion is the _____________________.

• center of rotation

• line of reflection

• scale factor

A ____________________ is the image produced when a figure is enlarged or reduced.

• dilation

• reflection

• translation

• rotation

What is the only transformation that creates similar shapes (non-congruent)?

• translation

• reflection

• rotation

• dilation

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor of 2.

• (2,4.5)

• (-8,-18)

• (8,18)

• (9,4)

Dilate Point A by a scale factor of 1/2

• (-4,-4)

• (-1,-4)

• (-1,-1)

• (-2,-2)

If I rotate a trapezoid

90⁰ counterclockwise,

and its in quadrant 3,

which quadrant would it move to?

• Quadrant 1 (I)

• Quadrant 2 (II)

• Quadrant 3 (III)

• Quadrant 4 (IV)