Each pair of figures is similar find the missing side PLEASE HELP I AM SO BEHIND ON ALGEBRA

1) x=5

2) x=72

Step-by-step explanation:

e being behind on algebra is worrying but what's really worrying is that this is geometry.

but ye you it has an x in it

1) form a ratio out of the bottom sides

2:6=1:3

so x=5

2) make another ratio:

12:72=1:6

x=72

hi my name is khan and I am not a terrorist

your answer is #3 , 8 - 3 square root of 11