A = (40.33094085211398, 16.00129432965249)
B = (28.717094247831714, -0.5601550881132464)
C = (57.41319056603589, -0.5601550881132464)
đa giác1, c, a, b = Polygon(A, B, C)
B' = Point(c)
d = Line(B', a)
C' = Intersect(d, b)
e = Line(C', c)
D = Intersect(e, a)
f = Segment(C', D)