Kreis einblenden

A = Intersect(xAxis, yAxis)
l1 = Sequence(Line[(0, 0), (1; i)], i, 30°, 360°, 30°)
c = Circle((0, 0), 1)
B = Point(Circle[(0, 0), 1])
f = Segment((0, 0), B)
P = Point(c)
g = Segment(A, P)
α = Angle(B, A, P)
b = CircleArc(A, B, P)
h = Segment(B, A)
a = false