This is very confusing. view picture

Side XZ corresponds to side AC, the ratio is 18:12.

To find the scale factor, divide 18 by 12.

18 ÷ 12 = 1.5

Multiply the length of side BC by 1.5 and it should equal the length of side YX, 15. This is how you know 1.5 is the scale factor.

10 × 1.5 = 15

Divide 12, the length of XY, by 1.5 to find the length of AB.

12 ÷ 1.5 = 8.

Side AB's length is 8.

Hope this helps :)

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}