M = Intersect(xAxis, yAxis)
cr1 = Circle(M, 4)
cr2 = Circle(M, 6)
cr3 = Circle(M, 7)
A = Point(cr1)
B = Point(cr2)
C = Point(cr3)
t1, c, a, b = Polygon(A, B, C)
périmètre: a + b + c
f = AngularBisector(B, A, C)
g = AngularBisector(C, B, A)
h = AngularBisector(A, C, B)