⑴如图,设正方形的边长为x,∵GF∥BC,∴⊿AGF∽⊿ABC,∴AM/AH=GF/BC,即﹙6-x﹚/6=x/10,解得x=15/4;
⑵仿⑴得⊿AGF∽⊿ABC,∴AM/AH=GF/BC,即﹙6-x﹚/6=2x/10,解得x=30/11,⑶﹙6-x﹚/6=nx/10,解得x=30/﹙3n+5﹚.
⑴如图,设正方形的边长为x,∵GF∥BC,∴⊿AGF∽⊿ABC,∴AM/AH=GF/BC,即﹙6-x﹚/6=x/10,解得x=15/4;
⑵仿⑴得⊿AGF∽⊿ABC,∴AM/AH=GF/BC,即﹙6-x﹚/6=2x/10,解得x=30/11,⑶﹙6-x﹚/6=nx/10,解得x=30/﹙3n+5﹚.