D = (-1.7417243731877872, -2.1618284154869514)
C = (7.877975439194944, -2.2212092785263593)
a = Segment(D, C)
A = (0.8710336005457957, 1.3812297458638918)
b = Segment(D, A)
c = Line(D, A)
d = LineBisector(a)
O = Intersect(c, d)
f = Line(A, a)
e = Line(O, C)
B = Intersect(f, e)
đa giác1, a_1, b_1, e_1, c_1 = Polygon(D, C, B, A)
g = Segment(D, O)
h = Segment(C, O)
A1 = Angle(D, A, B)
B1 = Angle(A, B, C)
B2 = Angle(O, B, A)
A2 = Angle(B, A, O)