%% auteur :
30 setxunit
30 setyunit
0.5 6.5 setxrange
0 6 setyrange
/O{3.5 3} def
/B{1 3} def
/C{6 3} def
/A{B O -130 rotatepoint} def
O point
pointilles
O 2.5 cercle
continu
[A B C] polygone
setTimesItalic
(A) A urtext
(B) B ltext
(C) C rtext
(O) O dtext
B O 2 marked
O C 2 marked
B A C angledroit
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