static void DemoDiemToaDo()
{
DiemToaDo a = XL_Diem.NhapDiem();
DiemToaDo b = XL_Diem.NhapDiem();
Console.WriteLine($"Khoang cach 2 diem la {XL_Diem.TinhKhoangCach2Diem(a, b)}");
}
public static double TinhChuViDaGiac(DaGiac daGiac)
{
double ChuVi = 0;
if (daGiac.ToaDoCacDinh.Length < 3)
{
Console.WriteLine("Da giac khong hop le");
return(ChuVi);
}
for (int i = 0; i < daGiac.ToaDoCacDinh.Length - 1; i++)
{
ChuVi += XL_Diem.TinhKhoangCach2Diem(daGiac.ToaDoCacDinh[i], daGiac.ToaDoCacDinh[i + 1]);
}
ChuVi += XL_Diem.TinhKhoangCach2Diem(daGiac.ToaDoCacDinh[0], daGiac.ToaDoCacDinh[daGiac.ToaDoCacDinh.Length - 1]);
return(ChuVi);
}