Răspuns:
verificăm teorema luiThales
a)EM/ED=FN/DF. 4/10=6/15. 2/5=2/5 (A)
b)(28-8)/8=15/6. 20/8=15/6. 5/2=5/2 (A)
c)9/(15-9)=(20-8)/8. 9/6=12/8. 3/2=3/2 (A)
