1 . 如图,在直三棱柱
中,
,点
在
上,且
,点
为
的中点,平面
与
交于点
.
平面
;
(2)若
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574f23b3c4f5d715aae06b3a0a0b1778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922f173757103cd70b2b594b14ce5b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8b4ce49a82dd588dce9e98c4077556.png)
您最近一年使用:0次
2 . 如图,在三棱锥
中,
为等边三角形,平面
平面ABC,
.
(1)求证:
平面PBA;
(2)若
,
,求点B到平面PAC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a698deee0d36c8d2772f39247f3f1b03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b85c51162539939ebdbaf8ff3749eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60964e720188e325eb18c9528b1fa95.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/f6c1f651-1956-4144-adb1-93ce90d367ca.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
您最近一年使用:0次
2023·全国·模拟预测
解题方法
3 . 如图1,在矩形ABCF中,
,E为CF的中点,现沿AE将
折起到
的位置,得到四棱锥
,如图2所示,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/6605526f-d9b6-4844-9089-4313231cb4a2.png?resizew=307)
(1)设平面ADB与平面CDE的交线为l,试探究l与EC的位置关系;
(2)求点C到平面DBE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077e97453ae00a89df35be3a0b722df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675127116b1cace5e3158a88b7a2044a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4151e948feebdf7b91fbe739feafa9bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/6605526f-d9b6-4844-9089-4313231cb4a2.png?resizew=307)
(1)设平面ADB与平面CDE的交线为l,试探究l与EC的位置关系;
(2)求点C到平面DBE的距离.
您最近一年使用:0次
2023·全国·模拟预测
解题方法
4 . 如图,在几何体
中,平面
平面
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/a81d48e1-53e3-4103-953b-c98bb9c231bd.png?resizew=171)
(1)证明:
;
(2)若四边形
是边长为4的正方形,
,求该几何体的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773e873ea0eb2c488fc02ab065e538a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6379891c7150af4188b5ab746d703bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/a81d48e1-53e3-4103-953b-c98bb9c231bd.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90197a948331e61db644266368017e3.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7b4940a9df073f73c5eb7365340dbc.png)
您最近一年使用:0次
2023·全国·模拟预测
解题方法
5 . 如图,多面体
中,
为正三角形,
,平面
平面
平面
.
(1)求证:
;
(2)求该多面体的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb13525ba2f601e237b86017a98b13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4d4921c8a8186dae66ba5b0230c61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60519f44e3007a192566e5a7b00f791d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea54a8278bb8ee6482a728e0fe04ed8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/b5a1fd99-afbe-4e88-b6ed-f603691409b6.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c847ae3dc08249be7d9904b539b58980.png)
(2)求该多面体的表面积.
您最近一年使用:0次
2023·全国·模拟预测
解题方法
6 . 如图,在四棱锥
中,
,
,
是等边三角形,且
,
,
,G为
的重心.
(1)证明:
平面PCD.
(2)若
,求点C到平面PAE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea8abb4cab55296ca7fc63de0af0aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/e74daa91-4337-4533-ba69-f3ae0839a5a1.png?resizew=157)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a227bcc7ee91e914c0c6bec05f82b0e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21bd7043d1e9d645183a84067144288.png)
您最近一年使用:0次
2023·全国·模拟预测
解题方法
7 . 如图,四棱锥
的底面是边长为2的菱形,且
,
是
上任意一点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/de684b38-7d3b-470c-99b4-5a4078823ee3.png?resizew=163)
(1)若
,求证:平面
平面
.
(2)若
,
,且
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/de684b38-7d3b-470c-99b4-5a4078823ee3.png?resizew=163)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d5ee2d6fcbcad17b69997ef0741d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
8 . 如图,四棱柱
的底面为梯形,
,三个侧面
,
,
均为正方形.
(1)证明:平面
平面
.
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25eb757d05fbff80d50c3bb8dbcb8657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/c36e5e7c-8ec7-478a-9e89-6d16faffad35.png?resizew=152)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181d5cebcf5a23ebcd6b72a94ef26e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028856d5101687dd8eaf130846489cfd.png)
您最近一年使用:0次
9 . 如图,在三棱锥
中,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/6be288d5-32d4-4418-a443-0630c70e61ee.jpg?resizew=126)
(1)证明:平面
平面
.
(2)若
,点
在
上,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84505e6b8c4d7c858efe088867a6436d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4371a4e0c848f28f263b10c1ee6b61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/6be288d5-32d4-4418-a443-0630c70e61ee.jpg?resizew=126)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8327483cdc94947584dd5f51f9dc8276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ab0b9969a7537711aadc610b363f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176385d91d5e29324fce4a932eff6a79.png)
您最近一年使用:0次
2023·全国·模拟预测
解题方法
10 . 如图1所示,四边形
为梯形,
为边
的中点,
为边
上一点,且
.若将四边形
沿
翻折,使得
与
重合,得到如图
所示的几何体,
为线段
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/3f2e6c6b-902b-45b6-a4a3-f1ce4622fd51.png?resizew=324)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1983486dec269d61289cc293ac5b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605ce6f221ce8cad191da0f84a216d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53abbd672b82a02c4975f99fbbd2c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2dcb2121af2b6d4ead458972439308.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/3f2e6c6b-902b-45b6-a4a3-f1ce4622fd51.png?resizew=324)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c365c269aaa5a59a35884ad65507bdc1.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21fddcc675877478ede6ce65b6a17f7.png)
您最近一年使用:0次