Cạnh đáy

Cạnh bên

Cạnh bên

E_1 = (-6.057978163022511, -11.480476279221453)
B = (4.450834041209396, -6.007136589517335)
C = (15.579958076941105, -5.970647658252641)
a = Segment(B, C)
b = LineBisector(a)
A = Point(b)
c = Segment(A, B)
d = Segment(A, C)