A = (-1.72, 1.6400000000000001)
B = (3.02, -1.52)
O = (2.7, 1.04)
C = Midpoint(A, B)
c = Circle(C, A)
M = Point(c)
N = Rotate(M, 270°, O)
poly1, n, m, o = Polygon(M, O, N)
α = Angle(N, O, M)
a = Segment(A, B)