Hi, I was confused on with this triangle.

At first I thought I should've started off with Pythagoras' Therom

I got thesquare root of (xAfter I got c, I didn't know if it mattered.^{2}+180) = c

I tried getting the smaller triangle's hypotenuse, which is thesquare root of (4 + x^{2}) = 2 + x

After that, I made the 2 hypotenuses equal to equal other

2 + x = square root of (x^{2 }+ 180)

4 + x^{2}= x^{2 }+ 180

Yeah.. I got lost here since I will be losing x...

Can someone give me a tip or explain? Thanks