public static double TinhChuViTamGiac(TamGiac t)
{
double res = -1;
if (t.TamGiacHopLe())
{
res = t.lineA + t.lineB + t.lineC;
}
return(res);
}
public static double TinhDienTichTamGiac2(TamGiac t)
{
double res = 1;
if (t.TamGiacHopLe())
{
return(Math.Abs((t.PointC.x - t.PointA.x) * (t.PointB.y - t.PointA.y)
- (t.PointB.x - t.PointA.x) * (t.PointC.y - t.PointA.y)) / 2);
}
return(res);
}
public static double TinhDienTichTamGiac(TamGiac t)
{
double res = 1;
if (t.TamGiacHopLe())
{
double p = (t.lineA + t.lineB + t.lineC) / 2;
res = Math.Sqrt(p * (p - t.lineA) * (p - t.lineB) * (p - t.lineC));
}
return(res);
}
public static TamGiac NhapTamGiac()
{
TamGiac t = new TamGiac();
Console.WriteLine("Nhap dinh A");
t.PointA = NhapDiem();
Console.WriteLine("Nhap dinh B");
t.PointB = NhapDiem();
Console.WriteLine("Nhap dinh C");
t.PointC = NhapDiem();
return(t);
}
