α = 1.3439035240356338 rad (slider from 0 to 3.141592653589793, step 0.017453292519943295)
E = (-14.655123760007344, -6.578487234666224)
F = (-11.702700798395371, -6.6140585956495)
j = Segment(E, F)
M = (-5.513283987305272, 5.515775499647873)
N = (-12.734270266910343, -0.5669272284924616)
d = Line(M, N)
O = (4.980267502761447, 5.2667759727649495)
N' = Rotate(N, α, O)
M' = Rotate(M, α, O)
d' = Line(M', N')
a = OrthogonalLine(O, d)
b = OrthogonalLine(O, d')
H = Intersect(d, a)
H' = Intersect(d', b)
c = Segment(O, H)
e = Segment(O, H')
f = CircleArc(O, H, H')
I = Intersect(d, d')
β = Angle(H, O, H')