A = (4.548801661193306, -4.175909911471111)
D = (10.119973151997684, -4.199416964174927)
a_1 = Segment(A, D)
c = Circle(A, D)
d = Circle(D, A)
b_1 = OrthogonalLine(A, a_1)
e = OrthogonalLine(D, a_1)
B = Intersect(c, b_1, 2.0)
C = Intersect(d, e, 2.0)
f = Segment(B, C)
g = Segment(C, D)
a = Segment(A, B)
i = Line(A, D)
G = Point(i)
j = Segment(D, G)
k = OrthogonalLine(G, j)
p = Circle(D, G)
q = Circle(G, D)
F = Intersect(q, k, 2.0)
G_1, E = Intersect(p, e)
l = Segment(E, F)
b = Segment(F, G)
n = Segment(E, D)
α = Angle(D, A, B)