Using degrees to find the value of x in a triangle.
I would believe at least one side is given. To find the other angles, you might want to you either sine, cosines or tangent.
Sinθ = opposite (opp) / Hypothenuse (hyp)
Cosθ = adjacent (adj) / Hypothenuse (hyp)
Tanθ = opposite (opp) / adjacent (adj)
where θ is the known angle.
you could also use the above to find the length of the unknown sides.
Also so remember the sum angles if a triangle is 180.