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verbatimtex
%&platex-jis
\documentclass{jarticle}
\begin{document}
etex;
beginfig(1);
u=40;
v=40;
r=30;
draw (u+r,v)..(u,v+r)..(u-r,v)..(u,v-r)..cycle withcolor red;
label(btex $B!}#1&A9b5H!#(B etex, (u,v));
u:=u+46;
draw (u+r,v)..(u,v+r)..(u-r,v)..(u,v-r)..cycle withcolor blue;
label(btex \tate $B!}#1&A9b5H!#(B etex, (u,v));
u:=u-23;
v:=v+40;
draw (u+r,v)..(u,v+r)..(u-r,v)..(u,v-r)..cycle withcolor green;
label(btex $BLL@Q$O(B $\pi r^2$ etex, (u,v));
endfig;
end.
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