Geo-Module 4 Quiz (Dilations)

When the scale factor of a dilation is greater than one, the dilation is a ___________?

• Reduction

• Enlargement

When the scale factor of a dilation is less than one, the dilation is a ___________?

• Reduction

• Enlargement

State the coordinate of the image of the given point G (-10,-6) under a dilation with center at the origin with the given scale factor of 1/2.

• G' (5,3)

• G' (20,12)

• G' (-20,-12)

• G' (-5,-3)

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

Does the image show a Dilation?

• Yes
• No

Triangle ABC will be dilated by a scale factor of 1/2.  What will be the coordinates of C'?

• (-1, -2.5)
• (12, 6)
• (3, -1.5)
• (0, 1.5)

Dilation rules use ______________ to change the ___________ of a shape. 

• addition; location
• division; direction
• subtraction; orientation
• multiplication; size

What scale factor was used to produce the image?

• 2
• -2
• ¹/₂
• 1

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 1/2.
• It's an enlargement; the scale factor is 2.
• It's a reduction; the scale factor is 1/2.
• It's a reduction; the scale factor is 2.

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?
A(3,3) B(6,6) C(9,3)

• A'(9,9) B'(18,18) C'(27,9)
• A'(6,6) B'(9,9) C'(12,6)
• A'(0,0) B'(3,3) C'(6,0)
• A'(1,1) B'(2,2) C'(3,1)