nguoi ta xep cac hinh lap phuong canh 1cm thanh 1 hinh lap phuong lon co dien tich toan phan la 600cm2. Sau do nguoi ta son tat ca cac mat cua khoi lon do. Hoi
a/ Co bao nhieu hinh lap phuong nho da dung de xep thanh hinh lap phuong lon?
b/ co bao nhieu hinh lap phuong nho chi duoc son dung 1 mat?