对于一个四面体来说，设棱长为a、b、c、d、e、f，怎么求四面体的外接球半径的通式？ 知乎 Sketch Coloring Page

对于一个四面体来说，设棱长为a、b、c、d、e、f，怎么求四面体的外接球半径的通式？ 知乎 Template

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tomski对于一个四面体来说，设棱长为a、b、c、d、e、f，怎么求四面体的外接球半径的通式？ 知乎 coloring

已知任意一个四面体的六条棱长，如何求出其体积？ 知乎 sketch template

正四面体ABCD棱长为2，E、F分别为BC、AD中点，则EF的长为 百度教育 sketch template

深入浅出数学系列立体几何（3）：正四面体的性质 知乎 sketch template

有限元的matlab实现，形函数（1） 知乎 sketch template

任意四面体的外接球半径公式 知乎 sketch template

对于一个多面体来说欧拉公式是指 A顶点数 棱数面数=2 B顶点数面数 棱数=2 C棱数顶点数=2 D不同于 sketch template

15．如图2正四面体ABCD的棱长为1H是顶点D的底面 ABC上的射影M在DH上且使得∠ABC=90°则DM的长 为 ——青夏教育 sketch template

深入浅出数学系列立体几何（3）：正四面体的性质 知乎 sketch template

四面体外接球半径公式杂谈 知乎 sketch template

深入浅出数学系列立体几何（3）：正四面体的性质 知乎 sketch template

有限元的matlab实现，形函数（1） 知乎 sketch template

有关立体几何的内切球、外接球的结论 知乎 sketch template

已知任意一个四面体的六条棱长，如何求出其体积？ 知乎 sketch template

已知正四面体的棱长为a．1求正四面体的高2求正四面体内切球的半径和体积．题目和参考答案——青夏教育精英家教�—— sketch template

求棱长为a的正四面体的内切球、棱切球的半径 百度教育 sketch template

初学讲义之高中数学二十：简单几何体 知乎 sketch template

对于一个四面体来说，设棱长为a、b、c、d、e、f，怎么求四面体的外接球半径的通式？ 知乎 sketch template

2．求棱长为a的正四面体外接球的半径．百度教育 sketch template

几何体表面距离最值1——展开图法 知乎 sketch template

已知正四面体ABCD的棱长为3cm．1已知点E是CD的中点点P在 ABC的内部及边界上运动且满足EP∥平面ABD试求点P的轨迹2 sketch template

7．如图正四面体的棱长均为且平面于A点BCD均在平面外且在平面同一侧则点B到平面的距离是 A． B． C． D．——青夏教育精英 sketch template

设四面体的各条棱长都为1若该四面体的各个顶点都在同一个球面上求该球的表面积．题目和参考答案——青夏教育精英家教�—— sketch template

求棱长为a的正四面体的外接球与内切球的半径．题目和参考答案——青夏教育精英家教�—— sketch template

如图，已知正四面体的棱长为，，分别为棱，的中点．若高途 sketch template

球体与正四面体切接 知乎 sketch template

正四面体一个顶点处的立体角是多大？ 知乎 sketch template

在棱长为a的正四面体中，相对两条棱间的距离为 百度教育 sketch template

求棱长为a的正四面体的外接球和内切球的半径 解析如图作AH⊥底面BCD于H则AH＝a设内切球的球心为O半径为rO点与ABC sketch template

正四面体 360百� sketch template

棱长为2的正四面体的四个顶点都在同一个球面上若过该球球心的一个截面如图1 则图中三角形的面积是 A． B． C． D．——青夏教育精英家教�—— sketch template

如图已知正方体ABCD A1B1C1D1的棱长为1EF分别在棱ABBC上G在对角线BD1上且AE＝BF＝D1G∶GB＝1∶2 sketch template

如图正三棱柱ABC A1B1C1的所有棱长都为2D为CC1中点．Ⅰ求证AB1⊥A1DⅡ求点C到平面A1BD的距离．题目和参考 sketch template

求棱长为a的正四面体的外接球和内切球的半径 解析如图作AH⊥底面BCD于H则AH＝a设内切球的球心为O半径为rO点与ABC sketch template

如图已知直四棱柱ABCD A1B1C1D1的底面边长和侧棱长均为1且满足∠BAD=60°O1为A1C1的中点．1求证BD⊥A1C sketch template

如图9一个正方体的棱长为2cm一只蚂蚁欲从A点处沿正方体侧面到B点处吃食物那么它需要爬行的最短路径的长是 ——青夏教育精英家教�—— sketch template

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