 f(x)=\frac{ ln(x) }{ 2} 

g(x)=ln^2(x)-3

f(x) = log(x) / 2
g(x) = log(x)^(2) - 3
D = Intersect(g, f, (7.3890560989306495, 1))
B = Intersect(g, f, (1, 0))
C = Intersect(f, g, (0.22313016014842982, -0.75))
a = OrthogonalLine(D, xAxis)
b = OrthogonalLine(C, xAxis)
A = Point(f)
c = OrthogonalLine(A, xAxis)
E = Intersect(g, c, (1.999292114225957, -2.5200376166452143))
d = Segment(A, E)
text3: "המרחק בין שתי נקודות   =  " + d