a² = b² + c² − 2bc·cos(A), similarly for b², c².a/sin(A) = b/sin(B) = c/sin(C).√[s(s−a)(s−b)(s−c)], or
½ab·sin(C) when SAS.r = 2·Area / p, circumradius R = a / (2·sin(A)).hₐ = 2·Area / a (and cyclic).a²+b²=c² (with C=90° opposite side c).Choose which optional categories you allow. Necessary cookies are always on. Privacy Policy.