Dilations About the Origin

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

_{Line AB corresponds with what line?} 

• XZ

• XY

• YZ

• YX

Dilate Point B by a scale factor of 1/2

• (1.5,-4)

• (-1.5,1)

• (-1,-1.5)

• (-2,-2)

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

After dilations, angles are ....

• similar

• congruent

• smaller

• larger

After dilations, the sides of the figure are...

• always smaller

• always larger

• the same

• proportional

A triangle is dilated with a center of dilation at the origin. Point P is on the figure and P' is the corresponding point on the image of the dilation. Point P is at (-2,3) and P' is at (-8,12). What is the scale factor?

• 2

• 4

• 6

• 9

A triangle has vertices at (1,1), (1,2), and (3,2). It is dilated by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

• (4,1) (4,2) (6,2)

• (1,4) (1,5) (3,5)

• (3,3) (3,6) (9,6)

Choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

What Transformation is visible?

• Reflection

• Translation

• Rotation

• Dilation