Area of a triangle from its sides: K = √(s(s−a)(s−b)(s−c)), where s is the semiperimeter. Derived from the law of cosines and the identity K = ½bc sin A. Kahan's numerically stable reformulation: K =…
Area of a triangle from its sides: K = √(s(s−a)(s−b)(s−c)), where s is the semiperimeter. Derived from the law of cosines and the identity K = ½bc sin A. Kahan's numerically stable reformulation: K =…