The crossing place of three edges is called point. The lengths of the three edges crossing at the same point are called length, width, and height.

 
  • 我們把三條棱相交的一點(diǎn)叫做頂點(diǎn),相交于一個(gè)頂點(diǎn)的三條棱的長(cháng)度叫做長(cháng)方體的長(cháng)、寬、高。
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