楼主: 龚永明魔方
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你能严格证明红蓝二个三角形不能拼成正方形吗? |
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公式D F2 U L2 U B2 U R2 U R' F2 R L U L' R' U R L' U L U L U2 L' U' L U2 L'
数列11121131221231321332223233311 |
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