Question

How do I do this?????

Answer 1

6/9= 2/3
Because these shapes are similar, the ratio of the sides will be the same and that ratio is 1:2/3 so to find the missing length all you do is  8*(2/3) which is

5 1/3

Hope this helps :)

Answer 2

Set up a proportion
8/9 = x/6
cross multiply
9x = 6*8
9x = 48
x = 48/9