} // end of - AreaRectangle()
public static dim2 AreaRectangleRing(dim1 b_ex, dim1 h_ex, dim1 b_in, dim1 h_in)
{
dim2 s1 = AreaRectangle(b_ex, h_ex);
dim2 s2 = AreaRectangle(b_in, h_in);
return(s1 - s2);
} // end of - AreaRectangle()
} // M
#endregion Properties
#region Operators
// operator *(dim1 d1, dim1 d2)
public static dim2 operator *(dim1 d1, dim1 d2)
{
dim2 d3 = new dim2();
d3.Mm_Sq = d1.Mm * d2.Mm;
return(d3);
} // operator *(dim1 d1, dim1 d2)
} // end of - AreaCircleRing()
public static dim2 AreaCircleRing(dim1 d_ex, dim1 d_in)
{
//return (Math.Pow(d_ex, 2) * PiDiv4) - (Math.Pow(d_in, 2) * PiDiv4);
dim2 s1 = AreaCircle(d_ex);
dim2 s2 = AreaCircle(d_in);
return(s1 - s2);
} // end of - AreaCircleRing()