straal = 3 (slider from 0 to 5, step 0.1)
A: (-9, -14)
B = PointIn((x - x(A))^(2) + (y - y(A))^(2) > straal^(2))
j = Segment(B, A)
c = Circle(A, straal)
f, g = Tangent(B, c)
C = Intersect(c, f)
h = Segment(C, A)
D = Intersect(c, j)
m = Segment(B, C)
H = Intersect(c, g)
n = Segment(B, H)
d = CircleArc(A, D, C)
G = Point(d)
q = Segment(B, G)
s = Ray(B, G)
p = Segment(H, A)
i = Line(B, G)
E = Intersect(c, i, 2)
k = Segment(G, E)
α = Angle(B, H, A)
β = Angle(A, C, B)