public static double Chuvi(Diem A, Diem B, Diem C) { double cv = 0; double AB, BC, AC; AB = Diem.Khoangcach(A, B); BC = Diem.Khoangcach(B, C); AC = Diem.Khoangcach(A, C); cv = AB + BC + AC; return(cv); }
public static double Dientich(Diem A, Diem B, Diem C) { double dt; float p; double AB, BC, AC; AB = Diem.Khoangcach(A, B); BC = Diem.Khoangcach(B, C); AC = Diem.Khoangcach(A, C); p = (float)(AB + BC + AC) / 2; dt = Math.Sqrt(p * (p - AB) * (p - BC) * (p - AC)); return(dt); }