Intensity rising, SOH CAH and TOA only works on triangles that has an angle on 90degrees. There are also Sine and Cosine thingies which applies to every triangle.
Sine:
Sin(A)/a = Sin(B)/b = Sin©/c
This can be used to calculate other sidelenghts or other angles if you know a pair(ex. A and a) and then one part of another pair(ex. just C, but not c).
Cosine:
c^2 = a^2 + b^2 - 2abcos©
can be used to calculate a side opposite of an angle, where you know the two adjacant sides. and also to calculate an angle if you know all 3 sides.
- basically you can calculate every parts of the triangle if you know 3 other parts, with the exception of you only knowing the angles.