Question

Geometry help please!
How you determine the scale factor of dilation?

Answer 1

@iGreen

Answer 2

Divide the points that are supposed to be similar and they will tell you the scale factor.

Consider Triangle A, with points: A (-2, 0), B (2, 0), and C (0, 4).

And Triangle B has been scaled and has points A' (-6, 0), B' (6, 0), and C' (0, 12).

So we know that A and A' are similar, B and B' are similar, and C and C' are similar.

Let's take A and A':

(-2, 0) (-6, 0)

-6 / -2 = 3

So the scale factor between Triangle A and Triangle B is 3.

Answer 3

I'm a little confused...

Answer 4

Yis, now I understand :)

Answer 5

Though, should I just write the first part as the answer?

Answer 6

@iGreen

Answer 7

Yeah, probably.

Answer 8

So it would be "Divide the points that are supposed to be similar and they will tell you the scale factor."?

Answer 9

Yes

Answer 10

Alright, thnx!
Next one :)