R = (-4.859525114590798, -7.042696744176458)
Q = (7.972843271803762, -7.237126568212739)
b = Segment(R, Q)
b_1 = OrthogonalLine(R, b)
P = Point(b_1)
a = Segment(P, Q)
c = Segment(P, R)
α = Angle(R, P, Q)
β = Angle(Q, R, P)
d = Distance(b, a)
e = OrthogonalLine(R, a)
S = Intersect(e, a)
f = Segment(R, S)
γ = Angle(R, S, Q)