28.4527 setxunit %% 10 mm %60 setxunit 0 8 setxrange 0 4 setyrange %[1 1 .5 .5 .1 .1] {orange} Quadrillage %tracerepere /O {2 1} def /cer {O 2.5} def /A {-5 cer cpoint} def /B {45 cer cpoint} def /I {20 cer cpoint} def /J {A B O I interdroite} def O I droite O A (->) line O B (->) line B A (->) line O J B angledroit