解题方法
1 . 如图,三棱柱
中,侧面
为菱形,
的中点为
,且
平面
.
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572587720155136/1572587726364672/STEM/7988be9fb3d24c42b9c7263068733771.png?resizew=321)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6fcf75bf62cafd43f82d23a8719deab.png)
(2)若
, 求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572587720155136/1572587726364672/STEM/7988be9fb3d24c42b9c7263068733771.png?resizew=321)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6fcf75bf62cafd43f82d23a8719deab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f726220aa5f759cc7d596a7a412f5f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2016-12-04更新
|
526次组卷
|
2卷引用:2015-2016学年广西柳州铁路一中高一上学期期末数学试卷
2 . 如图,四棱锥
底面是矩形,
平面
,
,
,
是
的中点.
(1)求证:平面
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://img.xkw.com/dksih/QBM/2016/12/10/1579114983874560/1579114984456192/STEM/59f33269-448f-4206-8b55-92ae4f999fdd.png?resizew=228)
您最近一年使用:0次
2016-12-13更新
|
2216次组卷
|
3卷引用:2017届湖南雅礼中学高三文上月考二数学试卷
3 . 如图,在三棱柱
中,
平面
,
,
,
,
,
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/2016/10/31/1573103713542144/1573103719571456/STEM/6904277ee5db4a98ba5d65e046ca17ec.png)
(1)求证:平面
平面
;
(2)求证:
平面
,并求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19434b67703318b18be7efee7be590bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62eccb33ea66c03222468628f74d8c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2016/10/31/1573103713542144/1573103719571456/STEM/6904277ee5db4a98ba5d65e046ca17ec.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fcf70859f620a7492e1351327725c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
您最近一年使用:0次
2016-12-04更新
|
838次组卷
|
5卷引用:2016-2017学年河北正定中学高二上月考一数学(理)试卷
4 . 如图所示的几何体中,
是正三角形, 且
平面
,
平面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572955150778368/1572955157053440/STEM/86bfc0c765024c648f35cae81fc3b149.png?resizew=127)
(1)求证:
;
(2)若
,求
与平面
所成角的正切值;
(3)在(2)的条件下, 求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5ae16a7145a28a91d45ef950a07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572955150778368/1572955157053440/STEM/86bfc0c765024c648f35cae81fc3b149.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785546906851d56da452b46052eeb8a0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25bb398581ca0655eacf1d0208f11a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558ce69401f3c97930f00ba0e2aa6647.png)
(3)在(2)的条件下, 求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
2016-12-04更新
|
577次组卷
|
2卷引用:2016届天津市和平区高三三模文科数学试卷
5 . 如图所示,平面
平面
,
是等边三角形,
是矩形,
是
的中点,
是
的中点,
与平面
成
角.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/16103ec6-13eb-4476-b339-1740143b76cf.png?resizew=247)
(1)求证:
平面
;
(2)若
,求二面角
的大小;
(3)当
的长是多少时,点
到平面
的距离为2,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abb27f8d654064a92f9d7a11e586ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/16103ec6-13eb-4476-b339-1740143b76cf.png?resizew=247)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0df73a49d4348a5c1e3aaa149cc8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0b10e8c3309c0a6f1e3bb7656afd45.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a681d311a864d38cf306a0c137cbcca.png)
您最近一年使用:0次
6 . 如图,已知四棱锥
的底面为菱形,
,
,
.
![](https://img.xkw.com/dksih/QBM/2016/3/25/1572556958875648/1572556965044224/STEM/63fc9ba9-f6d9-45a4-879a-f3f1dd934298.png)
(1)求证:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19e0ba32fcadd4114a3c52b52c3aea23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d539a68184fbd0ef4aa27d5bff31136.png)
![](https://img.xkw.com/dksih/QBM/2016/3/25/1572556958875648/1572556965044224/STEM/63fc9ba9-f6d9-45a4-879a-f3f1dd934298.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2016-12-04更新
|
788次组卷
|
3卷引用:2016届辽宁省鞍山市一中高三第四次模拟文科数学试卷
7 . 如图:正三棱柱ABC—A1B1C1中,D是BC的中点,AA1=AB=1.
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572510837161984/1572510842642432/STEM/283c966c4a5e4dc58193f35d29cb0cd6.png?resizew=164)
(1)求证:A1C//平面AB1D;
(2)求点C到平面AB1D的距离.
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572510837161984/1572510842642432/STEM/283c966c4a5e4dc58193f35d29cb0cd6.png?resizew=164)
(1)求证:A1C//平面AB1D;
(2)求点C到平面AB1D的距离.
您最近一年使用:0次
8 . 在四棱锥
中,底面
是边长为
的菱形,
,
面
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477973397504/1572477979598848/STEM/b8c9fb6920d94515998282c6d4e63a1f.png?resizew=216)
(Ⅰ)求证:
面
;
(Ⅱ)求点
到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477973397504/1572477979598848/STEM/b8c9fb6920d94515998282c6d4e63a1f.png?resizew=216)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477973397504/1572477979598848/STEM/835afb0831154e02982608e6ec78ae52.png?resizew=43)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(Ⅱ)求点
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477973397504/1572477979598848/STEM/0d416f0f09a74c5f957f5faddbdceac5.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
2016-12-04更新
|
657次组卷
|
4卷引用:2015-2016学年广西柳州铁路一中高一12月月考数学试卷
9 . 如图1,在直角梯形ABCD中,
,
,
,
,将
沿
折起,使平面
平面
,得到三棱锥
,如图2所示.
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572469750923264/1572469756649472/STEM/9bbb43fe9e53468782f34b25c1cc5938.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572469750923264/1572469756649472/STEM/6976e6fe38fe44459d3e5be849398b97.png?resizew=151)
(I)求证:
平面
;
(II)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a1721a436858a999093da04bc17bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151adae7bf60f109d3f275fd9fd4e5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e0b7d845cbceccd3e76ca461fcc534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572469750923264/1572469756649472/STEM/9bbb43fe9e53468782f34b25c1cc5938.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572469750923264/1572469756649472/STEM/6976e6fe38fe44459d3e5be849398b97.png?resizew=151)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(II)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
10 . 如图,直三棱柱
的底面是边长为
的正三角形,点M在边BC上,
是以M为直角顶点的等腰直角三角形.
![](https://img.xkw.com/dksih/QBM/2015/7/20/1572187881750528/1572187887419392/STEM/a022a6ca8d3a4dfc9131857f3378a90e.png?resizew=197)
(1)求证:直线
∥平面
;
(2)求三棱锥
的高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c21f920814c1c5e76d3f3b72bd22934.png)
![](https://img.xkw.com/dksih/QBM/2015/7/20/1572187881750528/1572187887419392/STEM/a022a6ca8d3a4dfc9131857f3378a90e.png?resizew=197)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b91c857bbe3c4f0f08dd2a4124a96e.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a45bcecac150a0198a1ec16c67cd356.png)
您最近一年使用:0次