... v\ #\ vJ 2014chfsd1 2014chns62 2014chfr sd3 ld mQt s6 chinh phuong PHAN M4,NH HA (GV THPT Nam YAn Thdnh, YAn Thdnh, NghQ An) Biti T21445 (Lop 7) Cho tam gi6c ABC co Biti T7 I 445 Cho tam ... Ty,7D, THCS Ly Nh6t Quang, DO Luong; VO Phuong Tdm, Trdn Ngpc Khdnh,7B, Hodng Minh Khanh, 7C, THCS H6 Xuen Huong, Luu; Cao Khdc Tdn,7A, THCS Cao Xudn Qu "h Huy, Di6n Ch6u; Hir finh: Bii Bd Vrt,7A, ... {For 6th grade) prove that _ 333 333 1 | \ - nJ\_/1222 222 2014chtsdl 2014chts62 2014chrisd3 is a perfect square Problem T21445 (For 7th grade) Given a triangle ABC with fu ,90" and the lengths...