Calculate area, perimeter and angles of a scalene triangle from three unequal sides.
A scalene triangle has three unequal sides. Area is computed via Heron's formula and angles via the law of cosines.
Law of Cosines
cos(A) = (b² + c² − a²) / (2bc)
All three sides (and all three angles) are different. No two sides are equal.
Yes — a right triangle can be scalene if its three sides are all different, like the classic 3-4-5 triangle.