Puzzleup No: 15 October 28, 2009
No: 15 October 28, 2009Grid
A 2x2 grid can be achieved by drawing three squares on a sheet. How many squares (in minimum) are needed to get a 8x8 grid? 是14吧。 具体怎么分析的 咳,错了,我是15. 2*23
3*3 5
4*47
5*59
外圈1个,对角线(n-1)*2 引申:在边长为8的正三角形的网格图,至少要画几个正三角形? 5楼说4*4,7个,错了
4*4,只需6个 是的,最外圈n正方形可以用外圈4个n-1正方形代替,然后(n-3)*2
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