a) hai góc kề

b) hai góc kề bù

O = (120.83801103039498, 176.6519489862473)
X = (226.27263332468067, 177.3548464682092)
a = Segment(O, X)
Y = (193.5879004134521, 238.5069273988949)
b = Segment(O, Y)
Z = (83.93589322739498, 252.56487703813298)
c = Segment(O, Z)
α = Angle(X, O, Y)
β = Angle(Y, O, Z)
A = (362.2832960843092, 178.760641432133)
B = (462.79763600486154, 180.1664363960568)
d = Segment(A, B)
e = Ray(B, A)
C = Point(e)
D = (394.26513151357585, 242.37286354968538)
f = Segment(A, D)
g = Segment(C, A)
γ = Angle(B, A, D)
δ = Angle(D, A, C)