E_1 = (-6.057978163022511, -11.480476279221453)
N = (2.8088321342981604, 0.23247065674536088)
P = (15.689424870735188, 0.7433156944510787)
a = Segment(N, P)
Q = (-1.0954835110241115, -7.101804527458159)
b = Segment(N, Q)
c = Line(Q, a)
d = Line(P, b)
R = Intersect(c, d)
e = Segment(N, R)
đa giác1, a_1, b_1, d_1, c_1 = Polygon(N, P, R, Q)
α = Angle(R, N, P)
β = Angle(N, R, Q)
γ = Angle(N, P, R)
δ = Angle(R, Q, N)