A = (-0.4, 4.74)
B = (-1.58, -1.76)
C = (6.04, 1.48)
a = Segment(A, B)
b = Segment(B, C)
c = Segment(C, A)
α = Angle(C, B, A)
d: a^(2) + b^(2)
e: c^(2)