input geometriesyr16; figure(0,0,10u,10u); trace feuillet withcolor blanc; pair O,A,B,C,M,N[]; O=u*(5,5); path cc; cc=cercles(O,3u); A=pointarc(cc,50); B=pointarc(cc,120); C=pointarc(cc,210); M=pointarc(cc,150); N1=symetrie(M,A,B); N2=symetrie(M,B,C); N3=symetrie(M,A,C); trace cc; marque_p:="croix"; nomme.urt(A); nomme.top(B); nomme.llft(C); nomme.ulft(M); fin; end