Trapèze complet
Author: Patrice Debart

A = (-2.08, 2.32)
B = (1.8, -0.72)
C = (3.1, 2.46)
AB = Segment(A, B)
d = Line(C, AB)
D = Point(d)
dAD = Line(A, D)
dBC = Line(B, C)
P = Intersect(dAD, dBC)
I = Midpoint(AB)
CD = Segment(D, C)
J = Midpoint(CD)
AP = Segment(A, P)
BP = Segment(B, P)
AC = Segment(A, C)
BD = Segment(B, D)
O = Intersect(BD, AC)
PI = Segment(P, I)
dOP = Line(O, P)