MI² \; = \;   \frac{ k² }{2 } \; - \;  \frac{ a² }{4 }   

M = (-0.10273911024118271, 1.1288435081176853)
P = (-1.183720729961818, 0.10791642282597533)
Q = (0.6254221197095231, 0.096656197620552)
Tên đa giác1, c, a, b = Polygon(M, P, Q)
I = Midpoint(a)
d = Segment(P, I)
e = Segment(I, Q)
m = Segment(M, I)