verbatimtex
%&latex
\documentclass{article}
\usepackage{mathrsfs}
\begin{document}
etex

input geometriesyr16;
figure(0,0,10.5u,11.25u);
trace grille(0.75) withcolor bleu;
pair A,B,C,E,F,G,K,L,M,N,P;
A=placepoint(2,4);
B=placepoint(4,6);
C=placepoint(6,3);
E=placepoint(10,9);
F=placepoint(12,6);
G=placepoint(8,7);
K=placepoint(10,4);
L=placepoint(6,5);
M=placepoint(3,7);
P=placepoint(5,7);
N=placepoint(9,10);
drawoptions(withpen pencircle scaled1.5bp);
trace triangle(A,B,C);
trace triangle(G,L,K);
trace triangle(G,E,F);
trace F--K;
drawoptions();
nomme.ulft(A);
nomme.urt(B);
nomme.lrt(C);
nomme.urt(E);
nomme.lrt(F);
nomme.lrt(K);
nomme.ulft(L);
nomme.ulft(G);
marque_p:="croix";
nomme.ulft(M);
nomme.urt(P);
nomme.ulft(N);
marque_p:="non";
label(btex ${\mathscr T}_1$ etex,iso(A,B,C));
label(btex ${\mathscr T}_2$ etex,iso(G,L,K));
label(btex ${\mathscr T}_3$ etex,iso(G,E,F));
label(btex ${\mathscr T}_4$ etex,iso(G,F,K));
trace feuillet withpen pencircle scaled 1.5bp withcolor bleu;
fin;
figure(0,0,10.5u,12u);
trace grille(0.75) withcolor bleu;
drawoptions(withpen pencircle scaled1.5bp);
trace triangle(A,B,C);
trace triangle(G,L,K);
trace triangle(G,E,F);
trace symetrie(triangle(A,B,C),M,P) withcolor 0.8*white;
trace symetrie(triangle(E,G,F),N) withcolor 0.8*white;
trace triangle(A,B,C) shifted(K-B) withcolor 0.8*white;
marque_p:="plein";
pointe(P+L-A);
marque_p:="non";
trace F--K;
drawoptions();
nomme.ulft(A);
nomme.urt(B);
nomme.lrt(C);
nomme.urt(E);
nomme.lrt(F);
nomme.lrt(K);
nomme.ulft(L);
nomme.ulft(G);
marque_p:="croix";
nomme.ulft(M);
nomme.urt(P);
nomme.ulft(N);
marque_p:="non";
label(btex ${\mathscr T}_1$ etex,iso(A,B,C));
label(btex ${\mathscr T}_2$ etex,iso(G,L,K));
label(btex ${\mathscr T}_3$ etex,iso(G,E,F));
label(btex ${\mathscr T}_4$ etex,iso(G,F,K));
fin;
end;