Chao tat cac ban. Tui hoc Ly cung tam tam, voi lai tui cung sap thi DH nen chi ban ve vat ly 12 thui.
Xin hoi cac ban bai toan sau:
" Cho A, B , C thu tu thang hang AB=a(cm), BC=b(cm). Va 1 Thau Kinh chua biet tinh chat. biet A la anh cua B, B la anh cua C. Tim vi tri dat TK va tinh chat TK."
Ban ve TK
Posted - 04/12/2003 : 19:54:25 
