Rotation and Dilation Review

Which of the following could be a dilation?

• (6x, 6y)

• (x + 1, y - 5)

• (x, -y)

• (-x, -y)

How do you find the scale factor when given a dilation?

• SF = new/original

• SF = new + original

• SF = original/new

• SF = new - original

Which scale factor would preserve congruence in a dilation?

• 0

• 1

• 4

• 0.5

A rectangle has an area of 30 cm². The rectangle is dilated with a scale factor of 3. What is the area of the new rectangle?

• 30 cm²

• 90 cm²

• 270 cm²

• impossible to know

Which is an example of the algebraic rule for a DILATION?

• (3x, 3y)

• (x+3, y-2)

• (-x, -y)

• (y, -x)

Which transformation does NOT preserve congruence?

• transformation

• reflection

• rotation

• dilation

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)

Choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½

• ¼

• 4

• 2

Triangle C is rotated 180° with the origin as the center of rotation to create a new figure. Which triangle shows the new location?

• A

• B

• C

• D