已知四棱锥的底面是矩形底面点分别是棱中点则 �棱与所在直线垂直 �平面与平面垂直 �的面积大于的面积 �直线与直线是异面直线以上结论 Sketch Coloring Page

已知四棱锥的底面是矩形底面点分别是棱中点则 �棱与所在直线垂直 �平面与平面垂直 �的面积大于的面积 �直线与直线是异面直线以上结论 Template

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tomski已知四棱锥的底面是矩形底面点分别是棱中点则 �棱与所在直线垂直 �平面与平面垂直 coloring

已知四棱锥的底面是矩形底面点分别是棱中点则 �棱与所在直线垂直 �平面与平面垂直 �的面积大于的面积 �直线与直线是异面直线 以上结论 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

18．在四棱锥P ABCD中底面ABCD是矩形侧棱 PA⊥底面ABCDAB=1直线PB与底面ABCD所成的角为45°四棱锥P sketch template

是不是底面是正方形的四棱锥就是正四棱锥？知乎 sketch template

四棱锥P ABCD中底面ABCD为矩形侧面PAB⊥底面ABCD．1证明平面PDA⊥平面PBA2若AB=2BC=$sqrt sketch template

已知四棱锥P ABCD中，底面ABCD为平行四边形，点M，N，Q分别在PA，BD，PD上（1）若PMMA=BNND=PQQD，求证 sketch template

正四棱锥图册 360百� sketch template

18．在四棱锥P ABCD中底面ABCD是矩形侧棱 PA⊥底面ABCDAB=1直线PB与底面ABCD所成的角为45°四棱锥P sketch template

如图四棱锥P ABCD中底面ABCD是矩形PA⊥底面ABCDPA=AD=2AB=2E为棱BC的中点．1证明平面PAE⊥平面 sketch template

题目如图四棱锥的底面是矩形点为的中点与交于点Ⅰ求异面直线与所成角的余弦值Ⅱ求证Ⅲ求直线与平面所成角的正弦值 sketch template

18．在四棱锥P ABCD中底面ABCD是矩形侧棱 PA⊥底面ABCDAB=1直线PB与底面ABCD所成的角为45°四棱锥P sketch template

已知在四棱锥中，底面为正方形，侧棱平面，点为中点，高途 sketch template

19．如图在四棱锥P ABCD中底面ABCD是矩形MN分别为PABC的中点 PD⊥平面ABCD且PD=AD=CD=1 1 sketch template

19．如图四棱锥E ABCD中底面ABCD为正方形EC⊥平面ABCDAB=CE=1G为AC与BD交点F为EG中点 Ⅰ求证 sketch template

四棱锥P ABCD的底面是正方形 Word文档在线阅读与下载无忧文档 sketch template

如图已知四棱锥P ABCDPA⊥平面ABCD底面ABCD为直角梯形∠A=90°且AB//CDAB=CD 1点F在线段PC上运动 sketch template

19．已知四棱锥P ABCD的底面ABCD的边长为1的正方形 PD⊥底面ABCD且PD=1 1求证BC//平面PAD 2若 sketch template

已知四棱锥P ABCD中 底面ABCD为平行四边形 点MNQ分别在PABDPD上且PMMA=BNND=PQQD 求证 sketch template

10．四棱锥P ABCD中底面ABCD是矩形AB＝1cmAD＝cm并且PA平面ABCD PA＝2cm点Q是平面PCD上一个动点则 sketch template

如图在四棱锥P ABCD中底面ABCD是矩形侧棱PA垂直于底面EF分别是ABPC的中点 1求证CD⊥PD 2求证 sketch template

18．四棱锥P ABCD中侧面PAD底面ABCD底面ABCD是矩形BC=2CD=2又PA=PDEG分别是BCPE的中点 1 sketch template

已知四棱锥的底面是边长为的正方形，平面，且，，，分高途 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

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

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

如图四棱锥P ABCD中底面四边形ABCD是正方形侧面PDC是边长为a的正三角形且平面PDC⊥底面ABCDE为PC的中点 ——青夏 sketch template

已知四棱锥P ABCD的底面ABCD是边长为2的正方形PD⊥底面ABCDEF分别为棱BCAD的中点．Ⅰ求证DE∥平面PFBⅡ sketch template

1．如图四棱锥S ABCD中底面ABCD为平行四边形侧面SBC⊥底面ABCD已知∠ABC＝45°AB＝2BC＝2SA＝SB sketch template

已知四棱锥P ABCD的底面为直角梯形AB∥DC∠DAB=90°PA⊥底面ABCD且PA=AD=DC=12AB=1．Ⅰ证明面 sketch template

已知四棱锥P ABCD的底面是边长为6的正方形侧棱PA⊥底面ABCD且PA=8则该四棱锥的体积是 A．288B．96C．48D sketch template

四棱锥 360百� sketch template

如图在底面是矩形的四棱锥P ABCD中PA⊥面ABCDPA=ADMN分别是PCAB的中点 1求直线PD与面ABCD所成的角 sketch template

如图已知四棱锥P ABCDPA⊥平面ABCD底面ABCD为直角梯形∠A=90°且AB//CDAB=CD 1点F在线段PC上运动 sketch template

百度教育 sketch template

正三棱锥 知乎 sketch template

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