如图,在棱长为2的正方体
中,M为棱
的中点,P为棱
的中点,平面
与平面
将该正方体截成三个多面体,其中N,Q分别在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/a7c4586e-fc8e-463e-af8b-00756deb1e22.png?resizew=171)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/c391f71f-aa13-472b-992b-b4005e50a54e.png?resizew=171)
(1)求证:
//平面
;
(2)求证:平面
//平面
;
(3)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea5787b53322bbfd5a6300aac1b84c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311e9cc12153a72e0b5c9290204badff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3134f4f892236d05e40a5e0c49f8df2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/a7c4586e-fc8e-463e-af8b-00756deb1e22.png?resizew=171)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/c391f71f-aa13-472b-992b-b4005e50a54e.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311e9cc12153a72e0b5c9290204badff.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe381b2c51738165e04edd87a14a967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311e9cc12153a72e0b5c9290204badff.png)
(3)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb837e11438f2cede53982203c4bd08.png)
21-22高一下·浙江·期中 查看更多[3]
更新时间:2022-09-29 14:26:04
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相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在以
、
、
、
、
、
为顶点的五面体中,
是平行四边形,
,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/e4d63113-d1e7-44ca-b0b9-66f63e8cb321.png?resizew=202)
(1)求证:
;
(2)若
,
,
与平面
所成角为
,求该五面体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386c7de62e8f9a8161ebaefe6b4ec35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07b92b8282c7fd1158b3b5098e38c39.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/e4d63113-d1e7-44ca-b0b9-66f63e8cb321.png?resizew=202)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dcbe075165566acf363cd199f07ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
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解答题-证明题
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名校
解题方法
【推荐2】如图在四面体ABCD中,△ABC是边长为2的等边三角形,△DBC为直角三角形,其中D为直角顶点,
.E、F、G、H分别是线段AB、AC、CD、DB上的动点,且四边形EFGH为平行四边形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/e05a972b-9e6d-4d68-9e9b-8723704beef5.png?resizew=172)
(1)求证:BC∥平面EFGH
(2)试探究当二面角
从0°增加到90°的过程中,线段DA在平面BCD上的投影所扫过的平面区域的面积;
(3)设
(
),且△ACD是以CD为底的等腰三角形,当
为何值时,多面体ADEFGH的体积恰好为
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a03e0d9ec888c1c343853295c40318b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/e05a972b-9e6d-4d68-9e9b-8723704beef5.png?resizew=172)
(1)求证:BC∥平面EFGH
(2)试探究当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9de8916f29934d3ac93e8ab3bf2ab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
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解答题-证明题
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解题方法
【推荐1】如图,四棱锥
的底面
为平行四边形,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2020/7/17/2507695159894016/2507739473240064/STEM/9890999dde7e4eb2b831ea6290261b67.png?resizew=182)
(1)求证:
平面
.
(2)在线段
上是否存在一点
使得
,
,
,
四点共面?若存在,求出
的值;若不存在,请说明理由.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2020/7/17/2507695159894016/2507739473240064/STEM/9890999dde7e4eb2b831ea6290261b67.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8298b274cf88d2fe96bfbb01e249282.png)
您最近一年使用:0次
解答题-证明题
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名校
【推荐2】如图,四棱锥
中,底面
是边长为 4的菱形,
,
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572518713155584/1572518718963712/STEM/2d0a5c44c5294384ba697fd8c1b2494c.png?resizew=223)
(1)求证:
平面
;
(2)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
平面
;
(3)若
,求三棱锥
的体积.
![](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/f75cf0288e9b7c31a426aff6b91a5a8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86db010859f7a243badec02946a4e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572518713155584/1572518718963712/STEM/2d0a5c44c5294384ba697fd8c1b2494c.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b70cef0b79ca64acbb67dc667fc53b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578fc8dd7d45fd2799f7d05ac89a2024.png)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
名校
解题方法
【推荐1】如图在直三棱柱
中,
,
,
,E是
上的一点,且
,D、F、G分别是
、
、
的中点,EF与
相交于H.
平面
;
(2)求证:平面
平面
;
(3)求平面EGF与平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8cb98c0adee7ca698d8b17dacb845b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80192548bb0412fe9305b5235453d636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de22059d7d80f24817235269e9bb1ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(3)求平面EGF与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
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【推荐2】如图,在斜三棱柱
中,
,D为AB的中点,
为
的中点,平面
平面
,异面直线
与
互相垂直.
(1)求证:平面
平面
;
(2)已知
,设
到平面
的距离为
,试问
取何值时,三棱柱
的体积最大?并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/0a47f445-bfa9-4cdb-bf68-4c72eee5cc18.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317a263c8fdaa6b403c44e752de8a203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a5bc11a77c2d0c4631b8dae59d451c.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1929bc67807d42fbb93a07387d78cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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