18．如图已知正四棱柱中底面边长侧棱的长为4过点作的的垂线交侧棱于点交于点． 1求证平面 2求与平面所成的角的正弦值 Sketch Coloring Page

18．如图已知正四棱柱中底面边长侧棱的长为4过点作的的垂线交侧棱于点交于点． 1求证平面 2求与平面所成的角的正弦值 Template

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tomski18．如图已知正四棱柱中底面边长侧棱的长为4过点作的的垂线交侧棱于点交于点． 1求证平面 coloring

正四棱柱图片定义千图� sketch template

18． 如图已知正四棱柱中底面边长侧棱的长为4过点作的的垂线交侧棱于点交于点． 1求证平面 2求与平面所成的角的正弦值 sketch template

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如图，在直四棱柱中，底面为直角梯形，，，，为上一点高途 sketch template

已知正四棱台的上底面边长为，侧棱长为，高为，则．高途 sketch template

直四棱柱的图片千图� sketch template

如图1由正四棱锥P ABCD和正四棱柱ABCD A1B1C1D1所组成的几何体的三视图如图2．1求证PC⊥平面A1BD2求点P到 sketch template

四棱柱 360百� sketch template

题目如图四个几何体分别是三棱柱四棱柱五棱柱和六棱柱三棱柱有5个面9条棱6个顶点观察图形填写下面的空．1四棱柱有个面 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是一个四棱柱被一个平面所截的几何体，底面是正方形，M是的中点， sketch template

在正四棱柱中，已知，，则下列说法正确的有高途 sketch template

如图已知正三棱柱 的底面边长为2侧棱长为点E在侧棱上点F在侧棱上且 I 求证 II 求直线与平面的夹角题目和参考 sketch template

“棱”指的是什么百度经验 sketch template

如图在正四棱柱ABCD A1B1C1D1中已知AA1=2AB且点P为DD1的中点．1求证直线BD1∥平面PAC2求证平面 sketch template

如图所示在直四棱柱ABCD A1B1C1D1中DB=BCDB⊥AC点M是棱BB1上一点． 1求证B1D1∥面A1BD 2 sketch template

如图已知正三棱柱 的底面边长为2侧棱长为点E在侧棱上点F在侧棱上且 I 求证 II 求直线与平面的夹角题目和参考 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

18． 如图在斜三棱柱ABC A1B1C1中侧面AA1B1B⊥底面ABC侧棱AA1与底面ABC成60°的角AA1=2底面ABC是边长 sketch template

18．如图直三棱柱A1B1C1 ABC中C1C=CB=CA=2AC⊥CB DE分别为棱C1CB1C1的中点 1求二面角B sketch template

14= 15如图四棱柱ABCD―A1B1C1D1的底面ABCD为正方形侧棱与底面边长均为2a——青夏教育精英家教�—— sketch template

14．如图在直四棱柱ABCD A1B1C1D1中已知DC＝DD1＝2AD＝2ABAD⊥DCAB∥DCE为DC的中点． 1求证 sketch template

如图，在四棱柱中，底面和侧面均为正方形高途 sketch template

如图所示在直四棱柱ABCD A1B1C1D1中DB=BCDB⊥AC点M是棱BB1上一点． 1求证B1D1∥面A1BD 2 sketch template

图1表示正六棱柱形状的高大建�物图2中的阴影部分表示该建�物的俯视图PQMN表示小明在地面上的活动区域．小明想同时看到该建�物的三个 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，在四棱锥中，底面是边长为2的正方形，侧面是正三角形，侧面底面 ， 平面平面 sketch template

18．如图已知斜三棱柱ABC A1B1C1中∠BCA=90°AC=BC=a点A1在底面ABC上的射影恰为AC的中点DBA1⊥AC1 sketch template

四棱柱ABCD A1B1C1D1的底面ABCD是菱形A1B＝A1D 求证1对角面AA1C1C⊥截面A1BD 2对角面 sketch template

如图直三棱柱ABC A1B1C1中AC=BC四边形ABB1A1是边长为1的正方形若EF分别是CB1BA1的中点．1求证EF∥ sketch template

如图在斜棱柱ABC A1B1C1中底面为正三角形侧棱长等于底面边长且侧棱与底面所成的角为60°顶点B1在底面ABC上的射影O恰好是 sketch template

如图在斜棱柱ABC A1B1C1中底面为正三角形侧棱长等于底面边长且侧棱与底面所成的角为60°顶点B1在底面ABC上的射影O恰好是 sketch template

如图在四棱锥P ABCD中底面ABCD是正方形侧面PAD⊥底面ABCD且PA=PD=AD=2EF分别为PCBD的中点．Ⅰ sketch template

18．如图已知斜三棱柱ABC A1B1C1中∠BCA=90°AC=BC=a点A1在底面ABC上的射影恰为AC的中点DBA1⊥AC1 sketch template

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