d(M;Δ) \; = \;  \frac{ |ax_M \; + \; by_M \; + \; c| }{ \sqrt{ a² \; + \; b² }  } 

O = Intersect(yAxis, xAxis)
M = (1.7320508075688772, 3)
A = (-0.8660254037844386, -0.5)
B = (5.066226900152257, 3.61617761558605)
Δ = Line(A, B)
a = OrthogonalLine(M, Δ)
M' = Intersect(Δ, a)