Find the value of the variable

x=6

Step-by-step explanation:

I would look at this triangle and notice that x can be solved by setting up a ratio.

I generally put the short side of the triangle on the top and the long side on the bottom

4/x = x/9

You then cross multiply to get 36=x^2, or +-6=x

A length of a triangle cannot be negative, so we are left with the answer x=6

on your paper it doesn't say the answer but the the answer is altitude

step-by-step explanation:

i think that you should ask google for the answer to that problem because if we don't know it google does