$\overline{CE}²=1²+1²-2×1×1×cos108°$
$\;\;\;\;\;\;\;\;=2+2sin18°=2+2×\frac{\sqrt5-1}{4}$
$\;\;\;\;\;\;\;\;=2+\frac{\sqrt5-1}{2}=\frac{3+\sqrt5}{2}$
$\overline{CE}=\sqrt{\frac{3+\sqrt5}{2}}=\sqrt{\frac{6+2\sqrt5}{4}}=\frac{\sqrt5+1}{2}$

$\overline{AB}=1,\overline{OB}=\frac{1}{2}$
$\overline{AO}=\frac{\sqrt5}{2},\overline{OF}=1$
$\overline{AF}=\overline{AC}=\overline{AD}=\frac{\sqrt5+1}{2}$

A = (-1.58, -0.4)
B = (1.04, -0.36)
a = Segment(A, B)
b = OrthogonalLine(B, a)
M = Midpoint(A, B)
c = Circle(B, M)
O = Intersect(c, b, 1)
d = Circle(O, B)
e = Ray(A, O)
F = Intersect(d, e, 2)
f = Circle(A, F)
g = Circle(B, A)
C = Intersect(f, g, 1)
h = Circle(C, B)
D = Intersect(f, h, 1)
k = Circle(D, C)
p = Circle(A, B)
E = Intersect(k, p, 2)
poly1, a_1, b_1, c_1, d_1, e_1 = Polygon(A, B, C, D, E)