cho 9 cay trong thanh 9 hang moi hang 3 cay
co 9 cay 10 hang moi hang 3 cay hay ve giup di
theo hinh 14 thi ta co the trong duoc 12 cay thanh 6hang moi hang 4 cay . hay ve so do trong 10 cay thanh 5hang moi hang 4cay
day la toan lop 6 hinh hoc tap 1 tang 107
ve:10 cay 9 hang moi hang 3 cay (dung co like)
16 cay thanh 8 hang moi hang co 4 cay
Co 6 cay sap thanh 5 hang moi hang 3 cay vay mik phai ve the nao
trong 12 cay thanh 6 hang 1 hang co 4 cay. Hay ve so do cua 12 cay do
ve :10 cay 9 hang . moi hang 3 cay
Trong 10 cay thanh 6 hang,moi hang 4 cay