20 setxunit
-5.5 5.5 setxrange
-4 1 setyrange
/quadrillagegray .2 def
quadrillage
/A {-4 -2} def
/B {0 0} def
/C {4 -2} def
A
B C vecteur
.5 mulv
addv
/N defpoint
1.3 setlinewidth
[A B C] polygone
N times2
setTimesItalic
(A) A dltext
(B) B ultext
(C) C drtext
(N) N drtext
|