A = (-5, 1)
B = (1, 4)
C = (4, 0)
r = Line(A, B)
s = Line(B, C)
t = Line(A, C)
D = Point(yAxis)
E = Point(t)
F = Intersect(r, xAxis)
G = Intersect(s, yAxis)
H = Point(r)
I = Point(t)
J = Point(s)
R1 = Point(r)
R2 = Point(r)
S1 = Point(s)
S2 = Point(s)
T1 = Point(t)
T2 = Point(t)