如图,在四棱锥
中,四边形ABCD是边长为2的正方形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/b952af2e-3e5a-4ed8-82c2-e18c55c46756.png?resizew=131)
(1)证明:平面
平面
;
(2)若
,
,点E,F分别为PB,PD的中点,求点E到平面ACF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/b952af2e-3e5a-4ed8-82c2-e18c55c46756.png?resizew=131)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2c4b7601274731a0f8140c99762501.png)
更新时间:2024-02-02 07:37:57
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,
是一个三棱锥,
是圆的直径,
是圆上的点,
垂直圆所在的平面,
,
分别是棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/90d4f3a3-01d4-468e-a380-243fb399361f.png?resizew=222)
(1)求证:
平面
;
(2)若二面角
是
,
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/90d4f3a3-01d4-468e-a380-243fb399361f.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e231505648333857565accb0c3c898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3304d151a8d42f932fbfb96f06bd9b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在四棱锥P-ABCD中,底面ABCD为菱形,
,点O为AD的中点,
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e4ed2e18-c105-4ab8-82b7-dbd268168088.png?resizew=169)
(1)求证:
平面PAD;
(2)若
,求平面PBC与平面PAD所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18a77f741b7f3553a7fa83e653ac667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f4df35b7d57bf69dea9f6cafa8fae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e4ed2e18-c105-4ab8-82b7-dbd268168088.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898f8f0c4060848800eb8df8ebb876fb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,四边形
是正方形,O是正方形的中心,
底面
,E是PC的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/52a53bec-873d-4f08-8a16-23beac41efe1.png?resizew=187)
(1)求棱锥
体积:
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e89e99ab9c1ece0cc5c3bbabaa97de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/52a53bec-873d-4f08-8a16-23beac41efe1.png?resizew=187)
(1)求棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,四边形
是正四棱柱
的一个截面,此截面与棱
交于点
,
,其中
分别为棱
上一点.
(1)证明:平面
平面
;
(2)
为线段
上一点,若四面体
与四棱锥
的体积相等,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54a965aa682d6d2aa484a43d4941c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094e639c2b31dc54b1b3e6456e77843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ebbdaca2dccbe2b04d30b2e7647c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c49eedafe3b03a81c9ca2ab75cbacb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845b14c775d9e390548f0d7e2914c2af.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38d46c073a39ba804abcf509fcbf473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54a965aa682d6d2aa484a43d4941c91.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586f3bc416371da2f99f4af85ecf6e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4138c7eeeca7c3a6abffdc9130bd83f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07377d977ef6a8f518b3004564544e5b.png)
![](https://img.xkw.com/dksih/QBM/2017/12/5/1832060792750080/1834248951848960/STEM/32b38b10-2f7c-4651-b44b-20c2f26ff2eb.png?resizew=191)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在正四棱台
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/e9d69856-04dd-48c7-839d-170db58ca0f7.png?resizew=202)
(1)证明:
平面
;
(2)若正四棱台
的侧棱长为
,过直线
的平面
与
平行,求平面
与平面
夹角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc47e8015e70a20456c25f742d54cae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/e9d69856-04dd-48c7-839d-170db58ca0f7.png?resizew=202)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f332eb13e2379aeedb236434947a8f.png)
(2)若正四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20838e72faf737614d76fcee82ab6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,已知四棱锥
的底面是菱形,对角线
交于点
,
,
,
底面
,
分别为侧棱
的中点,点
在
上且
.
四点共面;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ba1df94176a1f769c7a0a12bf357fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e6e2c17ac95483a840da8ddc85be9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930e85bc9f73e86cfb6ce9b076433f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed30b73beeccafd4ec854237b33e1e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfe1ad40befb43ffa3033dac111e12f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】如图,在几何体
中,上底面
和下底面
均为正方形,
,且平面
平面
,平面
平面
,E为CD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/4e1ca60a-d3e8-4ff9-bc73-cedb309f3068.png?resizew=185)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450953efb7d8a64365ddf750f167fbfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6678fa8114e790ab348f6ee25dcbec83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/4e1ca60a-d3e8-4ff9-bc73-cedb309f3068.png?resizew=185)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e16f65c3a318220c2f5baac171bbb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图所示,平面
平面ABCD,ABCD为正方形,
,且
,E,F分别是线段PA,PD的中点.问:线段CD上是否存在一点Q,使得点A到平面EFQ的距离为
?若存在,求出CQ的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c6c11ccee199cb04792115cee11fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/eb810680-b42e-49f1-89f3-4f429bd60fb5.png?resizew=153)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在棱长为4的正方体
中,O为正方形
的中心,点P在棱
上,且
.
所成角的余弦值;
(2)设点O在平面
上的射影为H,求证:
;
(3)求点
到平面
的距离;
(4)在线段
上是否存在点Q,使得
平面
?若存在,确定点Q的位置;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3082c96cb263ae888242114111baea5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)设点O在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562e708c422060142ee99eda9baca235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317f727d4d61935571b511f3e3aa6f2b.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562e708c422060142ee99eda9baca235.png)
(4)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c982eb645d77aa24c642fca6d72e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562e708c422060142ee99eda9baca235.png)
您最近一年使用:0次