解题方法
1 . 如图,在直三棱柱
中,
,点
是
的中点,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/6583a1ac-e1a8-47fb-a6a7-7bc7bfdb3147.png?resizew=251)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
平面
;
(2)求点
到平面
距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039d015ead0b14116df711bd2240d0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/6583a1ac-e1a8-47fb-a6a7-7bc7bfdb3147.png?resizew=251)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
您最近一年使用:0次
2022-09-19更新
|
219次组卷
|
2卷引用:湖北省宜昌英杰学校2022-2023学年高二上学期9月起点考试数学试题
解题方法
2 . 斜三棱柱
的底面为边长是4cm的正三角形,侧棱长为3cm,侧棱
与底面相邻两边都成60°角.
(1)求证:侧面
是矩形;
(2)求这个棱柱的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(1)求证:侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0894e228b6a0085aa3a161b384c63d30.png)
(2)求这个棱柱的侧面积.
您最近一年使用:0次
2022-09-15更新
|
113次组卷
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2卷引用:湖北省重点高中智学联盟2022-2023学年高二上学期10月联考数学试题
解题方法
3 . 如图,在四棱锥
中,
平面
,
平面
,
,
,求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34295a80212129405593c3bac51aef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfb66ff69cb334c87c5d4835b6b23c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100a16f1365eab6dbad9b46029edff87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bf71a0be2ed84d20571ecaee73baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dac81c6c7c1fda905663115ae347bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6579c5ffe03ee1d839cd04a2a0b32bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/81ae2397-2b96-4a13-b1f5-b62e6df0f713.png?resizew=177)
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4 . 如图,在多面体
中,
为等边三角形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68453afa4b2af05bcd884f9a7c476398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12acc8f4f79ffc65f85bc405287a08c9.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/531ec800-7d3c-45ab-abb4-a02ca88934f5.png?resizew=153)
(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/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164a4df60a15587971e883cf557b5ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68453afa4b2af05bcd884f9a7c476398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12acc8f4f79ffc65f85bc405287a08c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a06b5cd3910293ce3d671ba76e2553a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/531ec800-7d3c-45ab-abb4-a02ca88934f5.png?resizew=153)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0ca33e686caf0297d6cd27e9fa9079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
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2022-09-25更新
|
468次组卷
|
3卷引用:湖北省荆州市沙市中学2022-2023学年高二上学期第一次月考数学试题
名校
解题方法
5 . 如图所示,四棱锥
的底面
是平行四边形,
分别是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/cccfeee3-4930-4f22-8cc4-f456800e75f8.png?resizew=179)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb986e3dee4aa65b92cda9b11c1b8e18.png)
平面
;
(2)若
,求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790e1f26a6b7010bab031c5bfc655c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64b03bdd6fe567c99c15220aebbd63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c16bb78f27578cedfb680bb19c97e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/cccfeee3-4930-4f22-8cc4-f456800e75f8.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb986e3dee4aa65b92cda9b11c1b8e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e54073845d1ddb3526c9887524c197.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6c9d7d62fe841774b87372a884a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4294b7141d394654841008ac9b40dab.png)
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2022-10-07更新
|
528次组卷
|
4卷引用:湖北省武汉市武钢三中2022-2023学年高二上学期10月月考数学试题
名校
解题方法
6 . 如图1,四边形
是梯形,
是
的中点,将
沿
折起至
,如图2,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/2022/8/25/3051997355786240/3052662834151424/STEM/11b16ef4ffa04da5840a560dcd5860b6.png?resizew=170)
![](https://img.xkw.com/dksih/QBM/2022/8/25/3051997355786240/3052662834151424/STEM/d1324d2e5c26489b941c7fdb7030c258.png?resizew=165)
(1)若
是
的中点,求证:平面
平面
;
(2)若
,平面
与平面
夹角的余弦值为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2768b54752183b24f77a6a0bd5a542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee9bc57f1a415b5790b5b40854c832e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://img.xkw.com/dksih/QBM/2022/8/25/3051997355786240/3052662834151424/STEM/11b16ef4ffa04da5840a560dcd5860b6.png?resizew=170)
![](https://img.xkw.com/dksih/QBM/2022/8/25/3051997355786240/3052662834151424/STEM/d1324d2e5c26489b941c7fdb7030c258.png?resizew=165)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675e62b42d5693606536cd993e8e74e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbccb1ba0e436c5a3296955e8dd38853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b559200a2caa639355f7bc2ed8d37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe67036b4671b5d2a5c55b48c4d3bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2012a47fba3643fec7aea1f3fc41eac.png)
您最近一年使用:0次
2022-08-26更新
|
1200次组卷
|
6卷引用:湖北省九师联盟2022-2023学年高三上学期8月开学起点考试数学试题
名校
解题方法
7 . 如图,圆
,点
为直线
上一动点,过点
引圆
的两条切线,切点分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/0f8bcc31-0531-4056-929a-67c69211f5a8.png?resizew=189)
(1)(i)设点
,求
外接圆的方程;
(ii)求证:直线AB恒过定点,并求出该定点Q的坐标;
(2)若两条切线
于y轴分别交于
两点,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a10d715d1bb7ff3df392f8c43c5928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5899c2ac652c36c7fa77f2115762b770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/0f8bcc31-0531-4056-929a-67c69211f5a8.png?resizew=189)
(1)(i)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e61fc10944817a6e79944334cb4797d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
(ii)求证:直线AB恒过定点,并求出该定点Q的坐标;
(2)若两条切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0023c9e8e0fec24d3aa77d09b2e4e62.png)
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8 . 用坐标法证明:平行四边形的对角线的平方和等四条边的平方和.
您最近一年使用:0次
2023-01-06更新
|
106次组卷
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5卷引用:湖北省鄂州市鄂城区秋林高级中学2022-2023学年高二上学期10月月考数学试题
湖北省鄂州市鄂城区秋林高级中学2022-2023学年高二上学期10月月考数学试题广西壮族自治区桂林市灵川县广西师范大学附属中学2022-2023学年高二上学期10月月考数学试题人教A版(2019)选择性必修第一册课本例题2.3 直线的交点坐标与距离公式(已下线)2.3.2两点间的距离公式(导学案)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第一册)(已下线)2.3.1 两条直线的交点坐标、两点间的距离公式【第二课】
9 . 如图
是圆
的直径,点
在圆
所在平面上的射影恰是圆
上的点
,且
,点
是
的中点,
与
交于点
,点
是
上的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/16a5b37c-9eb4-4fbb-8a5f-c8cd3cc21de3.png?resizew=184)
(1)求证:
;
(2)求二面角
平面角的余弦值;
(3)若点
为
的中点,且
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3976d08e5f9e24e76ce9579c06a8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/16a5b37c-9eb4-4fbb-8a5f-c8cd3cc21de3.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60964e720188e325eb18c9528b1fa95.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee73f20e5d48fd32707e7644eb9e23f.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02aae3ca1fa1075fa53664736707716e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90da0522dd9378bab25de2f560aec563.png)
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解题方法
10 . 已知圆
和点
.
(1)过M作圆O的切线,求切线的方程;
(2)过M作直线l交圆O于点C,D两个不同的点,且CD不过圆心,再过点C,D分别作圆O的切线,两条切线交于点E,求证:点E在一条定直线上,并求出该直线的方程;
(3)已知
,设P为满足方程
的任意一点,过点P向圆O引切线,切点为B,试探究:平面内是否存在一定点N,使得
为定值?若存在,则求出定点N的坐标,并指出相应的定值;若不存在,则说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8e445500f8a9de2c8ead8b2f24b1fc.png)
(1)过M作圆O的切线,求切线的方程;
(2)过M作直线l交圆O于点C,D两个不同的点,且CD不过圆心,再过点C,D分别作圆O的切线,两条切线交于点E,求证:点E在一条定直线上,并求出该直线的方程;
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a6be776cdd229e5c1339265b23624a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82324edc595f52ce442f919872b3ea49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fce564bd898ee14b70791f5fccbcc0f.png)
您最近一年使用:0次
2022-11-11更新
|
915次组卷
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7卷引用:湖北省鄂西北六校(宜城一中、枣阳一中等)2022-2023学年高二上学期期中联考数学试题
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