"Dave Peterson" wrote in message
Your data doesn't describe a triangle.

If you had:

Angle Length
Side1 20 35
Side2 30
Side3

Then the triangle would be:

Angle Length
Side1 20 35
Side2 17 30
Side3 143 61.65

That would contain the formula I would need, as I can calculate Angle by
deducting Angle1 from Angle2

Would be much obliged if you could share the formula used to calculate the
blanks in this example you showed.