ε=2\gamma

ε_1=ε_2=γ

r

r

\frac{c}{2}

\frac{c}{2}

\frac{c}{\sin γ}=2r

M = (0, 0)
c_2 = Circle(M, 3)
A = Point(c_2)
B = Point(c_2)
C = Point(c_2)
d1, c, a, b = Polygon(A, B, C)
f = Segment(A, M)
g = Segment(M, B)
γ = Angle(A, C, B)
ε = Angle(A, M, B)
h = OrthogonalLine(M, c)
D = Intersect(h, c)
ε_1 = Angle(A, M, D)
ε_2 = Angle(D, M, B)
i = Segment(M, D)
E = (-5.372, 3.9)
F = (-3.672, 3.9)