Dilation Coordinate Grid

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)

A triangle has vertices A(0,0), B(8,0), C(3,-2). Find the coordinates of the triangle after a dilation with a scale factor of 4.

• A(3,3), B(4,4), C(-3,-4)

• A(-4,8), B(6.5,8), C(7,7)

• A(0,0), B(32,0), C(12,-8)

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

• always smaller

• always larger

• the same

• proportional

What is the scale factor?

• 2

• 1/2

• (1,2)

• (2,1)

What Transformation is visible?

• Reflection

• Translation

• Rotation

• Dilation

What is the center of dilation?

• (0,0)

• R

• C

• D

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

Triangle ABC is dilated to produce A'B'C' with a scale factor of 3/4. Which describes the relationship between the two triangles?

• A'B'C' is an enlargement

• A'B'C' is a reduction

• A'B'C' is congruent to ABC

• A'B'C' is a mirror image of ABC

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)