>>> C1 = Circle(P1, 3)
>>> C2 = Circle(P2, P3, P4)
>>> C2.area
1105*pi/98
>>> C2.radius
sqrt(2210)/14
>>> C2.equation()
(x - 5/14)**2 + (y - 27/14)**2 - 1105/98
>>> C2.center
Point(5/14, 27/14)
>>> C2.circumference
sqrt(2210)*pi/7

Create Circles.py