∡XOY = 90°

0° < α < 90°

90° < α < 180°

∡ XOY = 180°

B_1 = (117.14998662736197, 56.99499970180568)
O = (82.53009826347117, 173.13746157643777)
Y = (137.00465311551878, 172.43456409447586)
a = Segment(O, Y)
b = OrthogonalLine(O, a)
X = Point(b)
c = Segment(X, O)
α = Angle(Y, O, X)
D = (167.2292448398807, 171.02876913055206)
E = (226.27263332468067, 170.6773203895711)
d = Segment(D, E)
F = (295.8594840389092, 171.380217871533)
G = (349.98259014997586, 171.73166661251395)
e = Segment(F, G)
f = OrthogonalLine(D, d)
H = Point(f)
I = (214.67482487230924, 217.06855419905682)
g = Segment(D, I)
h = Segment(H, D)
β = Angle(E, D, I)
i = OrthogonalLine(F, e)
j = OrthogonalLine(F, i)
J = Point(j)
K = Point(i)
L = (255.4428788260997, 220.9344903498473)
k = Segment(F, L)
l = Segment(J, F)
m = Segment(K, F)
γ = Angle(G, F, L)
o = (424.4897232379377, 172.08311535349492)
N = (484.58745794568057, 173.13746157643777)
n = Segment(o, N)
p = Ray(N, o)
O_1 = Point(p)
q = Segment(O_1, o)
δ = Angle(N, o, O_1)