Enigme 1.

Zone de jeu

À quelle condition le point rouge devient-il bleu ?

A = (-11, 9)
B = (-8, 9)
C = (-4, 5)
D = (-4, 13)
poly1, a, b, c, d = Polygon(A, B, C, D)
f = Line(E, F)
A' = Mirror(A, f)
B' = Mirror(B, f)
C' = Mirror(C, f)
D' = Mirror(D, f)
H = (-16, 18)
I = (16, 18)
J = (16, 0)
K = (-16, 0)
Playground, h, i, j, k = Polygon(H, I, J, K)
G = PointIn(Playground)
L = (-14, 9)
A'_1 = Mirror(A, L)
B'_1 = Mirror(B, L)
C'_1 = Mirror(C, L)
D'_1 = Mirror(D, L)
poly1', g, l, m, n = Polygon(Dilate[A, 2, L], Dilate[B, 2, L], Dilate[C, 2, L], Dilate[D, 2, L])