Duong Thi Tam
20 tháng 12 2019 lúc 12:09
Goi chieu dai 3 manh la x,y,zTa co : x/5=y/7=z/10 ; x+y+z=62Ap dung tinh chat day ti so bang nhau x/5=y/7=z/10=x+y+z/5+7+10=62/22=31/11x/5=31/11 suy ra x=155/11y/7=31/11 suy ra y=217/11z/10=31/11 suy ra z=310/11Vay chieu dai 3 canh la 155/11;217/11;310;11