A = (-2.7, 1.5)
B = (-0.84, 3.22)
C = (1.66, 2.08)
D = (1, -3)
E = (-1.2, -1.22)
poly1, a, b, c, d, e = Polygon(A, B, C, D, E)
f, F, faceABF, faceBCF, faceCDF, faceDEF, faceAEF, arêteAF, arêteBF, arêteCF, arêteDF, arêteEF = Pyramid(poly1, 4)
M = Point(arêteDF)