Figuur I

Figuur III

straal = 3 (slider from 0 to 5, step 0.1)
A_1 = (-9, -21)
c_1 = Circle(A_1, straal)
E_1 = Point(c_1)
D_1 = Point(c_1)
g_1 = Segment(D_1, E_1)
d_1 = CircleArc(A_1, E_1, D_1)
C_1 = Point(d_1)
e_1 = CircleArc(A_1, D_1, E_1)
B_1 = Point(e_1)
f_1 = Segment(B_1, C_1)
F_1 = Intersect(f_1, g_1)
l = Line(F_1, A_1)
J, K = Intersect(c_1, l)
h_1 = Segment(F_1, D_1)
i_1 = Segment(F_1, C_1)
j_1 = Segment(F_1, E_1)
k_1 = Segment(F_1, B_1)
m = Segment(F_1, J)
n = Segment(F_1, K)
P = (-3, -12)
S = (-2, -12)
r_1 = Segment(P, S)
T = (-1, -12)
s_1 = Segment(S, T)
U = (0, -12)
t_1 = Segment(T, U)
V = (-3, -13)
W: (-1.5, -13)
a_1 = Segment(V, W)
Z = (0, -13)
b_1 = Segment(W, Z)
G_1 = (-3, -14)
H_1: (-1.5, -14)
f_2 = Segment(G_1, H_1)
I_1 = (0, -14)
g_2 = Segment(H_1, I_1)