Hình 23

B_2 = (8.28890909090909, -1.0854545454545483)
O = (-0.851090909090908, 0.27454545454545126)
B = (0.7689090909090914, -0.8054545454545485)
c = Circle(O, B)
D = (6.1089090909090915, -1.0254545454545485)
F = (11.328909090909091, -0.7854545454545483)
H = (16.48890909090909, -1.1854545454545484)
I = Point(c)
J = Point(c)
K = Point(c)
a = Segment(J, I)
b = Segment(K, I)
δ = Angle(J, I, K)