E_1 = (-6.057978163022511, -11.480476279221453)
B = (7.552393198708396, -5.53278048307631)
C = (19.885651966175033, -5.569269414341004)
a = Segment(B, C)
b = LineBisector(a)
A = Point(b)
đa giác1, b_1, a_1, c_1 = Polygon(B, A, C)