Rotations and Dilations

What is the rule for rotating a figure 180 degrees

• (-y, x)

• (-x, -y)

• (y, -x)

• (-y, -x)

State the coordinate of the image of the given point B (-10,-6) under a dilation with the given scale factor k = 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

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

• ½
• ¼
• 4
• 2

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

A turn is also called a ___________.

• Translation
• Reflection
• Rotation
• Transformation

How many degrees was the figure rotated?

• 90 degrees counterclockwise 
• 180 degrees
• 270 counterclockwise 
• 90 degrees clockwise

A dilation is which of the following: 

• An enlargement
• A reduction
• Either an enlargement or a reduction
• Neither an enlargement or a reduction

A scale factor of less than one means

• That the image will be larger than the pre-image.

• That the image will be the same as the preimage.

• That you need to subtract that amount off of each side.

• That the image will be a reduction of the preimage.

If the scale factor is greater than one, the new figure will be

• a reduction
• an enlargement
• a scale
• not proportional

How many degrees was the figure rotated clockwise?

• 90 degrees

• 180 degrees

• 270 degrees