b

a

a

b

a → b

b → a

+

-

+

-

A = (1.68, 3.3200000000000003)
B = (13.4, 9.94)
a_1 = Line(A, B)
C = (1.6600000000000001, 8.42)
D = (15.6, 6.04)
b = Line(C, D)
E = Point(b)
F = Point(b)
c = Segment(E, F)
G = Point(a_1)
H = Point(a_1)
O = Intersect(a_1, b)
J = (15.86, 11.34)
d = Line(J, O)
K = Point(d)
a = Segment(J, K)
f_1 = Segment(G, H)
α = Angle(J, O, H)
e = 5 (slider from 3 to 5, step 1)
β = Angle(H, O, J)
g = Segment(G, H)
L = (15.7, 6.04)
h = Line(L, O)
M = Point(h)
i = Segment(L, M)
j = Segment(E, F)
k = 1 (slider from 0 to 1, step 1)
f = 2 (slider from 0 to 2, step 1)
γ = Angle(F, O, L)
δ = Angle(L, O, F)
l = false
m = false
n = false
o = false
texte1: "a -> b :  R(O;+" + β + ") "
texte2: "a -> b :  R(O;-" + α + ")"
texte4: "b -> a :  R(O;+" + γ + ")"
texte3: "b -> a :  R(O;-" + δ + ")"