Three Parallelograms

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A = (9.88, 1.68)
B = (6.62, 0.44)
C = (11.94, -0.72)
c = Circle(A, B, C)
O = Center(c)
D = (15.02, 4.86)
f = Line(O, D)
U_1 = Point(c)
U_2 = Mirror(U_1, f)
g = Line(U_1, O)
U_3 = Intersect(c, g, 2)
h = Line(U_2, O)
U_4 = Intersect(c, h, 2)
i = OrthogonalLine(U_1, g)
j = OrthogonalLine(U_2, h)
k = OrthogonalLine(U_3, g)
l = OrthogonalLine(U_4, h)
P_1 = Intersect(f, i)
F = Intersect(f, i)
G = Intersect(f, i)
P_4 = Intersect(i, l)
P_3 = Intersect(l, k)
P_2 = Intersect(j, k)
q1, e, h_1, i_1, j_1 = Polygon(P_1, P_4, P_3, P_2)
m = Segment(U_1, U_2)
n = Segment(U_2, U_3)
p = Segment(U_3, U_4)
q = Segment(U_4, U_1)
m_1 = Intersect(f, m)
m_3 = Intersect(f, p)
m_4 = Midpoint(q)
m_2 = Midpoint(n)
r = Segment(m_1, m_2)
s = Segment(m_2, m_3)
t = Segment(m_3, m_4)
a = Segment(m_4, m_1)