B = (8.1167, 8.58121)
A = (-1.32, 0)
C = (13.72, 0)
isleta, v3, v1, v2 = Polygon(A, C, B)
mediatriz2 = LineBisector(v1)
mediatriz1 = LineBisector(v2)
O = Intersect(mediatriz2, mediatriz1)
d = 4.9 (slider from 0 to 10, step 0.1)
P = (6.640000000000001, 3.2800000000000002)
c = Circle(P, d)