如图所示是三棱锥d abc的三视图点o在三个视图中都是所在边的中点则异面直线do 和ab所成角的余弦值等于 A b c D Sketch Coloring Page

如图所示是三棱锥d abc的三视图点o在三个视图中都是所在边的中点则异面直线do 和ab所成角的余弦值等于 A b c D Template

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anonymous

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sketch #1289 peace within

anonymous

anonymous
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anonymous

anonymous
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anonymous

anonymous
sketch #3118 Joker Hernan Da Costa Marquez

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anonymous

anonymous
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sketch #1232 Dylan Thomas

anonymous

anonymous
sketch #1232 Dylan Thomas

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anonymous

anonymous
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anonymous

anonymous
sketch #5128 Italo Italo Abreu Jack Supple

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anonymous

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sketch #4867 Johnny Depp Ronin Ronin

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anonymous

anonymous
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anonymous

anonymous
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sketch #4695

anonymous

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tomski如图所示是三棱锥d abc的三视图点o在三个视图中都是所在边的中点则异面直线do 和ab所成角的余弦值等于 coloring

一个三棱锥的三视图如图所示则该三棱锥的体积是 A4 B C D8——青夏教育精英家教�—— sketch template

正三棱锥的高是多� 百度经验 sketch template

正三棱锥 知乎 sketch template

在三棱锥S ABC中AB=BC=SA=SC=AC=2二面角S AC B的平面角的余弦值是则三棱锥S ABC外接球的表面积是 A sketch template

如图所示是三棱锥D ABC的三视图点O在三个视图中都是所在边的中点则异面直线DO 和AB所成角的余弦值等于 A B C D sketch template

初学讲义之高中数学二十：简单几何体知乎 sketch template

如图，在三棱锥P ABC中，AB=BC=2√ 2，PA=PB=PC=AC=4，O为AC的中点（1）证明：PO⊥ 平面ABC；（2）若点M在棱 sketch template

已知正三棱锥P－ABC的底面边长为6，其内切球的半径为1，则此三棱锥的高为． sketch template

高中数学第一册上棱锥 Word文档在线阅读与下载无忧文档 sketch template

深入浅出数学系列立体几何（4）：球的切接问题（上）知乎 sketch template

已知三棱锥O ABC中OAOBOC两两垂直OC=2xOA=xOB=y且x Y=3则三棱锥O ABC的体积最大时其外接球的体积为 sketch template

深入浅出数学系列立体几何（4）：球的切接问题（上）知乎 sketch template

如图已知三棱锥的底面是直角三角形直角边长分别为3和4过直角顶点的侧棱长为4且垂直于底面该三棱锥的主视图是ABCD——青夏教育 sketch template

如图所示在三棱台A′B′C′ ABC中沿A′BC截去三棱锥A′ ABC则剩余的部分是 A．三棱锥B．四棱锥C．三棱柱D．组合体题目 sketch template

如图所示在三棱锥P ABC中PA⊥平面ABC E为AC的中点 1求异面直线BE与PC所成角的余弦值 2求二面角P BE C sketch template

如图所示在三棱台A′B′C′ ABC中沿A′BC截去三棱锥A′ ABC则剩余的部分是 A．三棱锥B．四棱锥C．三棱柱D．组合体题目 sketch template

三棱锥三视图怎么画三棱锥的三视图五棱锥怎么画大山谷图库 sketch template

三棱锥的三视图画法千图� sketch template

三棱锥P ABC中底面 ABC是边长为2的正三角形PA⊥底面ABC且PA=2则此三棱锥外接球的半径为 A．B．C．2D．题目和 sketch template

如图在三棱锥P ABC中PA=PB=PC=AC=4AB=BC=2．1若点P在底面ABC内的射影是点O试指出点O的位置并说明理由 sketch template

9．如图在三棱锥P – ABC中PA = PB PC BC 2且则PA与底面ABC所成角为 A．30° B．60 sketch template

如图，已知正三棱柱ABC A 1B 1C 1的所有棱长都为2，D为CC 1中点，E为BC的中点（1）求证：BD⊥ 平面AB 1E；（2）求三 sketch template

如图三棱锥P ABC中 PAC ABC是等边三角形．Ⅰ求证PB⊥ACⅡ若二面角P AC B的大小为45°求PA与平面ABC所 sketch template

如图在三棱锥P ABC中AC＝BC＝2∠ACB＝90°AP＝BP＝ABPC⊥AC． Ⅰ求证PC⊥AB Ⅱ求直线BC与平面 sketch template

正三棱锥 百度百� sketch template

如图所示在四棱锥S ABCD中底面ABCD是正方形侧棱SD⊥平面ABCDSD=DC点E是SC的中点作EF⊥SB交SB于点F．1 sketch template

侧面是全等的等腰三角形的棱锥是 A．正棱锥 B．侧棱长相等的棱锥 C．斜高长相等的棱锥 D．以上均不对——青夏教育精英家教�—— sketch template

理在正三棱锥中分别是棱的中点且若侧棱则正三棱锥外接球的表面积是 A． B． C． D．文已知棱长为的正四面体右内切球 sketch template

5．已知三棱锥S ABC的底面是正三角形点A在侧面SBC上的射影H是 SBC的垂心SA=a则此三棱锥体积最大值是 A． B C D sketch template

如图，在四棱锥P ABCD中，底面ABCD是平行四边形，∠BCD=120°，侧面PAB⊥底面ABCD，PB=2√6，AB=AC=PA=2√3 sketch template

如图所示侧面是全等的等腰三角形的棱锥是 A正棱锥 B侧棱长相等的棱锥C斜高长相等的棱锥 D以上均不对题目和参考答案——青夏教育精英 sketch template

15．三棱锥P ABC的四个顶点在同一球面上若PA⊥底面ABC底面ABC是直角三角形PA＝2AC＝BC＝1则此球的表面积为——青夏 sketch template

81 基本立体图形1 棱柱、棱锥、棱台湛江贵哥讲数学博客园 sketch template

$三条侧棱两两垂直的正三棱锥其俯视图如图所示主视图的边界是底边长为2的等腰三角形则主视图的面积等于$frac{{sqrt{6}}}{3 sketch template$

12．如图所示在四棱锥P ABCD中底面ABCD是矩形PA＝AB＝2BC＝a又侧棱PA⊥底面ABCD 1当a为何值时BD⊥ sketch template

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