ε=2\gamma

M = (0, 0)
c = Circle(M, 3)
A = Point(c)
B = Point(c)
C = Point(c)
d1, c_1, a, b = Polygon(A, B, C)
f = Segment(A, M)
g = Segment(M, B)
γ = Angle(A, C, B)
ε = Angle(A, M, B)
D = (-5.118, 2.124)
E = (-3.878, 2.124)