如图,三棱柱
中,侧面
为菱形.
(1)(如图1)若点
为
内任一点,作出
与面
的交点
(作出图象并写出简单的作图过程,不需证明);
(2)(如图2)若面
面
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/20/e0f10652-7cd0-467a-aefa-9992091d7297.png?resizew=448)
(1)(如图1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c407eeb34204a1df967b8fbe481cb04d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)(如图2)若面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803fa75db3ac3a26a41e347dc4165026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5b6e6e204c3063771701c2c83fc6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69418f38ada198be25a69cb651e33e04.png)
22-23高三下·广西·阶段练习 查看更多[3]
广西壮族自治区桂林市等2地2023届高三下学期3月月考数学(理)试题(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-2(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1
更新时间:2023-06-16 21:26:56
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,三棱柱
中,
,
,
分别为棱
的中点.
(1)在平面
内过点
作
平面
交
于点
,并写出作图步骤,但不要求证明.
(2)若侧面
侧面
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd46d5d5bf257e68486240eab6f7322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce21311bf50215101b605356358b9a8.png)
(1)在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49282e671435e499a78d26c7b81a711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49282e671435e499a78d26c7b81a711.png)
![](https://img.xkw.com/dksih/QBM/2017/4/11/1663400608202752/1663602963496960/STEM/7dcdd5d30d914ac1be1aea61b7874334.png?resizew=265)
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解答题-作图题
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解题方法
【推荐2】如图,棱长为2的正方体ABCD—A1B1C1D1,E、F分别为棱B1C1、BB1中点,G在A1D上且DG=3GA1,过E、F、G三点的平面
截正方体.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/a23d33a2-9a19-45b5-9a1e-89ce3ba52963.png?resizew=171)
(1)作出截面图形并求出截面图形面积(保留作图痕迹);
(2)求A1C1与平面
所成角的正弦值. (注意:本题用向量法求解不得分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/a23d33a2-9a19-45b5-9a1e-89ce3ba52963.png?resizew=171)
(1)作出截面图形并求出截面图形面积(保留作图痕迹);
(2)求A1C1与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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解答题-证明题
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适中
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解题方法
【推荐1】如图,四边形
为等腰梯形,
,将
沿
折起,使得平面
平面
,
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/9ed578a7-bb41-47a4-85d3-960a128a21bc.png?resizew=290)
(1)求证:
;
(2)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5456549c0d04cdeb16dbe85afdc55c16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06123e81c41198c76a3335757fac2c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab27b523a3bd6dfaac51894ad19afce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/9ed578a7-bb41-47a4-85d3-960a128a21bc.png?resizew=290)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d72a007e3c4a134956b0e3fbde5f46.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
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解答题-问答题
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【推荐2】如图所示,四棱锥
,已知平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/2017/5/10/1683941256560640/1684210213453824/STEM/8e120f21327d4cce9f2c866812753660.png?resizew=173)
(I)求证:
;
(II)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306b9504b52df5ad6697fa87200e8a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e91c9d603269df091caaa70992a958.png)
![](https://img.xkw.com/dksih/QBM/2017/5/10/1683941256560640/1684210213453824/STEM/8e120f21327d4cce9f2c866812753660.png?resizew=173)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ddae20626f9aaac616d2a3b5d95bd.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02be76ab355d2135d84e046d8f9251c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f178906e90bafd73e0ef9f89814855d5.png)
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解答题-证明题
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适中
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解题方法
【推荐1】如图,矩形
所在平面垂直于直角梯形
所在平面,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/eb477529-ac5f-4076-9166-3f9e50e35aff.png?resizew=164)
(1)求证:平面
平面
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edde83bb9f916c16907be5f16295d9f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a96585c8cb5ae16fc3c6c61a2d39550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2c4a8cfa4f7413474ce1fb968fe62b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1562c70574c16182b1a519acfd0eaf50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/eb477529-ac5f-4076-9166-3f9e50e35aff.png?resizew=164)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceba23305ece474fa28cad722cc2a5f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b2674ede7e9ef08971ea45df873971.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe62d5717407ff76048cde28db9e9940.png)
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【推荐2】已知三棱柱
中,
,
,
,
.
平面
;
(2)若
,且P是
的中点,求平面
和平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df209c58c4cc146ef62100e6d3b068d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88e7df45acca3fc3d3da3370f0c32bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df00cdf77ed39ca5a0b305861a693142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1752434352ecb9834eaba9c63fc9abe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
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【推荐3】如图,在四棱锥
中,
平面
,四边形
为平行四边形,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/b1a51c30-b1a1-49b1-a4b4-e3bfccedbfd4.png?resizew=182)
(1)证明:
平面
;
(2)当直线
与平面
所成角的正切值为
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e46e202250119a2fd936db719af42bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a975fada5e7d3f71321aaff7c2f5abc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/b1a51c30-b1a1-49b1-a4b4-e3bfccedbfd4.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
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