input geometriesyr13;
figure(0,0,10u,7u);
pair R,S,T,A,B,C;
R=u*(0.75,0.75);
S=u*(4.25,1);
T=u*(2,4);
trace triangle(R,S,T);
label(btex $\cal F$ etex,iso(R,S,T));
marque_p:="croix";
A=u*(4,4);
B=u*(7,6);
C=u*(9,5);
nomme.top(A);
nomme.top(B);
nomme.top(C);
drawarrow A--B withpen pencircle scaled 1.5bp;
drawarrow B--C withpen pencircle scaled 1.5bp;
fin;
figure(0,0,11u,7u);
pair R,S,T,A,B,C;
R=u*(0.75,0.75);
S=u*(4.25,1);
T=u*(2,4);
trace triangle(R,S,T);
label(btex $\cal F$ etex,iso(R,S,T));
marque_p:="croix";
A=u*(4,5);
B=u*(10,5);
C=u*(8,5);
nomme.top(A);
nomme.top(B);
nomme.top(C);
drawarrow A--B withpen pencircle scaled 1.5bp;
drawarrow B--C withpen pencircle scaled 1.5bp;
fin;
figure(0,0,5u,5u);
pair A,B,C,M;
A=u*(0.75,0.75);
B=u*(3.25,1.25);
C=u*(2,3.25);
M-C=B-A;
trace A--B--M--C--cycle;
marque_p:="non";
nomme.llft(A);
nomme.lrt(B);
nomme.top(M);
nomme.ulft(C);
fin;
end