Figuur II

straal = 3 (slider from 0 to 5, step 0.1)
E = (-9, -22)
d = Circle(E, straal)
G = Point(d)
l = Line(E, G)
H = Intersect(d, l, 2)
g_1 = CircleArc(E, H, G)
r = CircleArc(E, G, H)
m = Segment(G, H)
I = Point(r)
n = Segment(G, I)
p = Segment(I, H)
K = Point(g_1)
s = Segment(K, H)
q = Segment(I, K)
ε = Angle(H, I, K)
ζ = Angle(K, I, G)