public clsLine(clsPoint a, clsPoint b)
{
A1 = a;
B1 = b;
}
public clsHinh()
{
A = new clsPoint();
B = new clsPoint();
C = new clsPoint();
}
public clsHinh(clsPoint a, clsPoint b, clsPoint c)
{
A = a;
B = b;
C = c;
}
public clsTriangle(clsPoint a, clsPoint b, clsPoint c)
{
A1 = a;
B1 = b;
C1 = c;
}