Beispiel

P

t

r

Gegenbeispiel

M = (-13.5, 2)
r_1 = 1 (slider from 0 to 5)
k = Circle(M, r_1)
A = (-14.391681752333973, 0.1929304584224689)
t, g = Tangent(A, k)
P = Intersect(k, t)
r = Segment(M, P)
a = true
B = Point(k)
f = Line(A, B)
h = Segment(M, B)
β = Angle(M, B, A)
b = false
P_1 = Point(t)
P_2 = Point(t)
i = Segment(M, P_1)
j = Segment(M, P_2)