All lengh values are given and in the end i want to know the angles, so i have to know the height of the triangle to be able to use sinus etc.
I know how to do it, but:
h²=[(c²+b²-a²)/2c²]-b² doesn't work because i get to big values in it...
Example: 21,21,36.548 the result for h² is 2096711 which can't be true, maybe my calculation is worng too.

Thanks for your help

Hello,

you could try this formula instead:

hc = sqrt(b*b - pow((c*c + b*b - a*a) / (2*c), 2))