class TAMGIAC
{
public DIEM A;
public DIEM B;
public DIEM C;
public void NhapTamGiac(string ghiChu)
Console.WriteLine(ghiChu);
A = new DIEM();
A.NhapDiem("Nhap diem A");
B = new DIEM();
B.NhapDiem("Nhap diem B");
C = new DIEM();
C.NhapDiem("Nhap diem C");
}
public double TinhChuVi()
return A.TinhKC(B) + B.TinhKC(C) + C.TinhKC(A);