Médiatrices d'un triangle
Author: Patrice Debart

A = (-2, 2)
B = (-1, -3)
C = (4, 1)
AB = Segment(A, B)
BC = Segment(B, C)
AC = Segment(C, A)
mOC' = LineBisector(AB)
mOA' = LineBisector(BC)
mOB' = LineBisector(AC)
A' = Midpoint(B, C)
B' = Midpoint(A, C)
C' = Midpoint(A, B)
O = Intersect(mOA', mOB')
c = Circle(O, A)
OA = Segment(O, A)
OB = Segment(O, B)
OC = Segment(O, C)