-1 6 setyrange
-4 4 setxrange
/a 3 def
/x 1 3 div def
/B {a neg 0} def
/C {a 0} def
/A {C B 60 rotatepoint} def
/P {x A B ABpoint} def
/M {x B C ABpoint} def
/N {x C A ABpoint} def
%%[A B C P M N] points
[P M N] polygone
medium setlinewidth
[A B C] polygone
A P 1 marked
B M 1 marked
N C 1 marked
setTimesItalic
(A) A utext
(B) B dltext
(C) C drtext
(P) P ultext
(M) M dtext
(N) N utext
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