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什麼叫直四棱柱正四棱柱
什麼叫直四棱柱正四棱柱
更新时间:2024-11-16 03:01:47

  直四棱柱

  定義:側棱垂直于底面的四棱柱叫做直四棱柱。

  特點:直四棱柱的側棱長與高相等,直四棱柱的側面及經過不相鄰的兩條側棱的截面都是矩形。

  正四棱柱

  定義:上、下底面都是正方形,且側棱垂直于底面的棱柱叫做正四棱柱。

  相關關系:正方體都是正四棱柱,但正四棱柱不都是正方體。長方體都是直四棱柱,但不一定是正四棱柱,正四棱柱都是長方體。

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