public clsHinh()
{
d1 = new clsDiem();
d2 = new clsDiem();
r1 = new clsDiem();
r2 = new clsDiem();
c1 = new clsDiem();
c2 = new clsDiem();
}
public clsTamGiac(clsDiem c1, clsDiem c2)
{
C1 = c1;
C2 = c2;
}
public clsLine(clsDiem d1, clsDiem d2)
{
D1 = d1;
D2 = d2;
}
public clsHinhThoi(clsDiem r1, clsDiem r2)
{
R1 = r1;
R2 = r2;
}