I'm assuming you are in geometry.
Let's use some Trig to solve this problem.
Sine, Cosine, and Tangent.
Chief S o/h C a/h T o/a. That's how I remember.
You are trying to find the opposite, and you have the adjacent. So, we would use Tangent to find our answer.
Tan 49= x/55 Multiply 55 on both sides.
55 (Tan 49)=x
I got 63.27026....
The hundredth place is the zero.
63.270= x
I hope this helps!
~cupcake
Plug that into a calculator.