Scale Factor Dilation

If the two figures are similar, what is the length of the missing side (x)?

• 12 cm

• 14 cm

• 21 cm

• 4 cm

The vertices of HJKL are as follows: H(-10, -4) J(6, -2) K(0,4) L(-4, 6). Find the coordinates of H'J'K'L' after the HJKL if dilated using a scale factor of 1/2.

• H'(-5, -2) J'(3, -2) K'(0, 2) L'(2, 4)

• H'(-5, -2) J'(3, -1) K'(0, 2) L'(-2, 3)

• H'(-7, -2) J'(3, -2) K'(4, 2) L'(2, 4)

• H'(-10, -2) J'(6, -2) K'(0, 2) L'(4, 4)

Triangle PQR is shown. What are the coordinates of Q' when triangle PQR is dilated by a scale factor of 4 using the origin as center?

• Q' (16,20)

• Q' (20, 16)

• Q' (36, 16)

• Q' (24, 9)

Choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

Does the image show a Dilation? If yes, did the image enlarge, reduce or none of the above?

• Yes, enlarge

• Yes, reduce

• No

In the figure above, a dilation from A to A' has occurred. What is the scale factor?

scale factor = _______

Mathematical Equivalence

ON

Polygon A'B'C'D'E' is a dilation of polygon ABCDE, with the origin as the center of dilation.  Which of the following is the scale factor that was used to create the dilation?

what is the scale factor?

• 3

• 2

• 1/2

• 1/3

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.

What is the scale factor?

• k = 2

• k = 1/2

• k = 4

• k = 1/4