Enter any 3 known values (sides/angles) to solve the triangle
This triangle solver uses the law of sines and law of cosines to compute all missing sides and angles given any three known values (at least one must be a side). It validates the triangle inequality theorem and displays the perimeter and area using Heron's formula.
The sum of any two sides of a triangle must be greater than the third side. If this condition fails, a triangle cannot be formed with the given side lengths.
No — knowing only angles gives the shape but not the size (similar triangles). You must know at least one side length to determine the triangle uniquely.