k_a

k_b

k_c

A = (4, 9)
B = (9, 1)
C = (3, 1)
t1, c, a, b = Polygon(A, B, C)
F_a = Midpoint(a)
F_c = Midpoint(c)
F_b = Midpoint(b)
f = Segment(F_a, F_b)
g = Segment(F_a, F_c)
h = Segment(F_b, F_c)
d = true
e = true
i = true