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⇤ ← Revision 1 as of 2004-10-12 04:45:45
Size: 271
Comment:
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Size: 199
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| attachment:E__Program Files_Tencent_QQ_66921888_image_{EC761D1C-ECAB-4FC9-AFE5-CAC8F0524BD9}.JPG | attachment:rbox1.JPG |
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直观的图形
立方体的情况: attachment:rbox1.JPG
有两条边相等的情况:
attachment:rbox2.jpg
三条边都不相等的情况:
attachment:rbox3.jpg