Dilations

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

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

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 pre-image.
• That you need to subtract that amount off  of each side.
• That the image will be a reduction of the pre-image.

Tags

CCSS.8.G.A.4

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

When you translate, (x,y+6) will move _____.

• 6 units right
• 6 units left
• 6 units up
• 6 units down

Tags

CCSS.8.G.A.3

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

• reduction
• enlargement
• scale factor
• center of dilation

Tags

CCSS.8.G.A.1

CCSS.8.G.A.3

CCSS.8.G.A.4

In a dilation what mathematical operation is used with the scale factor?

• addition 
• subtraction 
• multiplication 
• division 

Tags

CCSS.HSG.SRT.A.1

You can map PQRS to TUVW by first doing a reflection and then a dilation. What is the dilation?

• (x,y) -> (3x, 3y)
• (x,y) -> (1/3x,1/3y)
• (x,y) -> (2x, 2y)
• (x,y) -> (1/2x, 1/2y)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

How would you translate point P to P'?

• Translate 2 units to the right and  8 units down
• Translate 3 units down and 2 units to the right
• Translate 4 units down and 4 units to the left
• Translate 8 units to the right and 2 units down

Tags

CCSS.8.G.A.1

CCSS.8.G.A.3

If a shape is dilated by a scale factor of one-half, what is the resulting perimeter? 

• The same as the perimeter of the preimage
• The new perimeter is bigger than the preimage
• The new perimeter is smaller than the preimage
• The new perimeter is 4 times the original

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Triangle ABC is dilated using a scale factor of 1/2. What are the new coordinates of point A'?

• (-3, 3)
• (-12, 12)
• (-2, 2)

Tags

CCSS.8.G.A.3