如图:ABCD是平行四边形,
平面ABCD,
∥
,
,
,
.
(1)求证:
∥平面PAD;
(2)求证:
平面PAC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f04edd173055da613832b187737ce4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d41255d37fab193323961d79fc94f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/5b8bb8ff-cbb7-4385-8155-a8b7ce1f3652.png?resizew=124)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
23-24高二上·内蒙古呼和浩特·阶段练习 查看更多[4]
内蒙古呼和浩特市第二中学2023-2024学年高二上学期10月月考数学试题甘肃省兰州市兰州一中2023年普通高中合格性考试数学模拟试题(已下线)第四篇 “拼下”解答题的第一问 专题1 立体几何的第一问【练】黑龙江省哈尔滨市哈工大附中2023-2024学年高二上学期期末数学试题
更新时间:2023-10-24 20:08:21
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解答题-问答题
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解题方法
【推荐1】如图,在四棱锥
中,,
,
,
,
、
、
分别为线段
、
、
的中点,
证明:直线
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f650a167515ec959bcc93e927bd981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee72dbf16db9bb8b5b51576a0619c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f374baaa5a31893355f913fcd249e456.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e64c8533-b7de-4972-82a0-a103fc1ea292.png?resizew=224)
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解答题-证明题
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解题方法
【推荐2】已知
在平面
外,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/ad465693-fdf0-4293-a22a-e18f6e4922b8.png?resizew=346)
(1)如图1,若
,
,
,求证:
三点共线;
(2)如图2,若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/ad465693-fdf0-4293-a22a-e18f6e4922b8.png?resizew=346)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b203f3a022c25aad67e0e4760aea30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69771723ae0564656e791834495f1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d1d91ced5c15dd6a1285f50df11e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fc107c4b33d6dd648b396156494ea9.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e16cb55efadc7972d48b5b021261dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a546df0d0c8f706bb4383164599e35f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c193eaf4c5ea5a58ed82457cf92c6893.png)
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【推荐1】如图,P为
所在平面外一点,
为PC中点,直线PC与平面
垂直吗?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5213965a0473cd5990e1ca77ea13649f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://img.xkw.com/dksih/QBM/2011/2/25/1576735418540032/1576735434555392/STEM/a14e7d240b0b4b22bc938e8d96f88619.png?resizew=179)
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名校
解题方法
【推荐2】在四棱锥
中,底面
为梯形,
,
,
,
,
,
⊥平面
.
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9742a7f64ff91be02601331f4ef2bb4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b3539fcb35e07fcf3339eb04e7748d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab4007a35a23105744177d982caf747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6823a329628699619a39cde927510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db37b5ce697dab3189a15881d00fcd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/a71e5192-9737-4ee3-9971-35af857f8eed.png?resizew=147)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a0d238b6e9b49bbea22a79402e8e4f.png)
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