2744
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diện tích 1 mặt HLP là: 1176:6 = 196 (cm2)
mà 14x14 = 196 nên cạnh HLP là 14 cm
số HLP cạnh 1 cm để ghép: 14x14x14:(1x1x1) = 2744 hình
Đ/s: 2744 hình
duyệt đi