autocrop
-10 4 setyrange
-15 5 setxrange
/A {-2 2} def
/B {2 2} def
/C {2 -2} def
/D {-2 -2} def
D point
[A B C D] polygone
[A C] ligne
[B D] ligne
/C1 {D D A distance} def
/C2 {C A C distance} def
/E {-90 C1 cpoint} def
90 270 C1 Cercle
135 225 C2 Cercle
gsave
newpath
E smoveto
270 90 C1 Cercle_
135 225 C2 Cercle_
clip
hachure
grestore
pointilles
[D E] ligne
setTimesItalic
(A) A uctext
(B) B urtext
(C) C drtext
(D) D drtext
(E) E drtext
<tex>
${\cal C}_1$
</tex>
130 C1 cpoint [1.3 dup] ultexlabel
<tex>
${\cal C}_2$
</tex>
170 C2 cpoint [1.3 dup] drtexlabel
|