M = (1, -1)
A = (-1, 1)
c = Circle(M, A)
P = (7, 3)
a = Segment(P, M)
b = LineBisector(a)
D = Intersect(b, a)
d = Circle(D, P)
T_2, T_1 = Intersect(d, c)
t_1 = Line(P, T_1)
t_2 = Line(P, T_2)
u = Vector(M, T_1)
v = Vector(M, T_2)
p = Line(T_1, T_2)