Find the immediate answers for your construction projects (roof calculations, step hand rails, etc.) in engineering, at school, etc... This triangle solver as a trigonometry calculator applies the trigonometric functions of Heron's formula, The Law of Cosines and Sines and the Pythagorean Theorem. It's triangular calculation engine will also calculate the triangle if you only know two altitudes + an angle or side. In case of SSA or other scenarios with insufficient data for congruence, the tri