如图所示,在四棱锥P
ABCD中,底面ABCD是∠DAB=60°且边长为
的菱形,侧面PAD为正三角形,其所在的平面垂直于底面ABCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/8e840a11-4094-44e7-a891-60a94a13ce96.png?resizew=188)
(1)若G为AD边的中点,求证:BG⊥平面PAD;
(2)若E为BC边的中点,能否在棱PC上找一点F,使得PA//平面DEF?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/8e840a11-4094-44e7-a891-60a94a13ce96.png?resizew=188)
(1)若G为AD边的中点,求证:BG⊥平面PAD;
(2)若E为BC边的中点,能否在棱PC上找一点F,使得PA//平面DEF?并证明你的结论.
22-23高二上·四川眉山·期中 查看更多[6]
四川省眉山市仁寿第一中学南校区2022-2023学年高二上学期期中考试数学(理)试题四川省眉山市仁寿第一中学南校区2022-2023学年高二上学期期中考试数学(文)试题(已下线)专题8-4 非建系型:探索性平行与垂直证明及求角度(已下线)8.6.3平面与平面垂直(第2课时平面与平面垂直的性质定理)(精练)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)专题09 基本图形的平行与垂直-期中期末考点大串讲(苏教版2019必修第二册)江西省丰城中学2022-2023学年高一下学期期末考试数学试题
更新时间:2022-11-02 10:47:25
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【推荐1】在四棱锥中,四边形ABCD为正方形,平面
平面ABCD,
为等腰直角三角形,
,
.
![](https://img.xkw.com/dksih/QBM/2021/10/26/2837681161961472/2843072668581888/STEM/80050b143bb2468fa92ffd10e6ec3884.png?resizew=230)
(1)求证:直线
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(2)设E为CD的中点,求点E到平面PBC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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![](https://img.xkw.com/dksih/QBM/2021/10/26/2837681161961472/2843072668581888/STEM/80050b143bb2468fa92ffd10e6ec3884.png?resizew=230)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
(2)设E为CD的中点,求点E到平面PBC的距离.
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【推荐2】如图所示,在梯形
中,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/b3d8fda4-123a-4c26-b1cc-e6ea9b6c7381.png?resizew=162)
(Ⅰ)设M为
的中点,证明:
;
(Ⅱ)若
,求点A到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9285d8bb8eab800235cb25d0a21c34.png)
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(Ⅰ)设M为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d82f9287f42a4e0df1e0cb607c5125b.png)
(Ⅱ)若
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【推荐1】四棱锥S﹣ABCD如图所示,其中四边形ABCD是直角梯形,AB⊥AD,AD⊥DC,SA⊥平面ABCD,DA=DC
AB=1,AC与BD交于点G,直线SC与平面ABCD所成角的余弦值为
,点M在线段SA上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/c8bf860c-0803-45e7-92ed-38e268e15bd5.jpg?resizew=237)
(1)若直线SC
平面MBD,求
的值;
(2)求平面SBC与平面BCD所成二面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50a39604477d1d9326eb455cda2e838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/c8bf860c-0803-45e7-92ed-38e268e15bd5.jpg?resizew=237)
(1)若直线SC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b98851cd97e52ae204272ab60a0a4c.png)
(2)求平面SBC与平面BCD所成二面角的正切值.
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【推荐2】已知四棱锥S﹣ABCD中,底面ABCD是边长为4的菱形,∠BAD=60°,SA=SD=2
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λ,SA//平面BEF.
![](https://img.xkw.com/dksih/QBM/2020/4/28/2451319528767488/2451957711675392/STEM/eb9794ddf8844ebbb6bb9127d26b0557.png?resizew=255)
(1)求实数λ的值;
(2)求三棱锥F﹣EBC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965629d9cabfe0cdf6925d4a80e84a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257d7be31115c5aa711d37c9506eae9c.png)
![](https://img.xkw.com/dksih/QBM/2020/4/28/2451319528767488/2451957711675392/STEM/eb9794ddf8844ebbb6bb9127d26b0557.png?resizew=255)
(1)求实数λ的值;
(2)求三棱锥F﹣EBC的体积.
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