Q = (-3.381858451915059, -6.692723060911152)
R = (5.328597664910338, -6.7316090257184085)
p = Segment(Q, R)
b = OrthogonalLine(Q, p)
P = Point(b)
c = Segment(P, R)
r = Segment(P, Q)
e = OrthogonalLine(Q, c)
D = Intersect(e, c)
r' = Segment(P, D)
p' = Segment(D, R)
h = Segment(D, Q)
i = OrthogonalLine(P, r')
j = OrthogonalLine(R, p')
E = Point(i)
k = OrthogonalLine(E, i)
F = Intersect(j, k)
l = Segment(P, E)
m = Segment(F, R)
q = Segment(E, F)
α = Angle(Q, D, R)
β = Angle(Q, P, D)
γ = Angle(R, Q, P)