Dilations to Get New Coordinates

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. The dilation is (X,Y) --- (4x,4y)

• 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)

Which transformation does the graph show?

• translation

• reflection

• rotation

• dilation

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

• ½

• ¼

• 4

• 2

Which rule shows the transformation?

• (x, y) ----> (0.5x, 0.5y)

• (x, y) ----> ( 2 + x, 2 + y)

• (x, y) -----> (2x, 2y)

• (x, y) -----> (3x, 3y)

The figure BCDE is dilated about the origin using a scale factor of 4.

If B(1,2), C(1,1), D(3,1), E(3,2), then what are the coordinates of the B', C', D', and E'?

B' = ​ (a)  

C' = ​ (b)  

D' = ​ (c)  

E' = ​ (d)  

• (4,8)

• (4,4)

• (12,4)

• (12,8)

• (2,2)

• (8,4)

• (4,2)

• (12,1)

Choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

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.