Đo góc PQN

A = (8.80135544864729, -3.3051111158428896)
B = (25.843708987623383, -3.3051111158428896)
b = Line(A, B)
M = (13.16676293981772, 2.9100453122641667)
a = Line(M, b)
c = OrthogonalLine(M, b)
N = Intersect(b, c)
E = Point(a)
d = OrthogonalLine(E, b)
F = Intersect(b, d)
α = Angle(F, N, M)
β = Angle(N, M, E)
P = Point(a)
C' = Rotate(M, 50.0*°, P)
γ = Angle(M, P, C')
e = Line(P, C')
Q = Intersect(b, e)
δ = Angle(P, Q, N)
f = false