r

r

r

r

Teilwinkel

Winkel

Zentriwinkel

M = (-8, 2)
r = 3.5 (slider from 0 to 5)
c = Circle(M, r)
A = Point(c)
B = Point(c)
C = Point(c)
D = Point(c)
f = Segment(A, B)
g = Segment(B, C)
h = Segment(C, D)
i = Segment(D, A)
j = Segment(A, M)
k = Segment(M, B)
l = Segment(M, C)
m = Segment(M, D)
α_1 = Angle(M, A, D)
δ_2 = Angle(A, D, M)
δ_1 = Angle(M, D, C)
γ_2 = Angle(D, C, M)
γ_1 = Angle(M, C, B)
β_2 = Angle(C, B, M)
β_1 = Angle(M, B, A)
α_2 = Angle(B, A, M)
α = Angle(B, A, D)
δ = Angle(A, D, C)
γ = Angle(D, C, B)
β = Angle(C, B, A)
a = false
b = true
φ_2 = Angle(A, M, B)
φ_3 = Angle(B, M, C)
φ_4 = Angle(C, M, D)
φ_1 = Angle(D, M, A)
d = false