haromszog_sulypontja

A = (2, 4)
B = (10, 5)
C = (3, 9)
t1, c, a, b = Polygon(A, B, C)
S: ((x(A) + x(B) + x(C)) / 3, (y(A) + y(B) + y(C)) / 3)
F_{AB}: ((x(A) + x(B)) / 2, (y(A) + y(B)) / 2)
f = Line(C, F_{AB})
F_{BC}: ((x(B) + x(C)) / 2, (y(B) + y(C)) / 2)
g = Line(A, F_{BC})
F_{AC}: ((x(A) + x(C)) / 2, (y(A) + y(C)) / 2)
h = Line(B, F_{AC})