名校
1 . 如图,在三棱锥
中,
,
,
,
,
,
分别为线段
,
上的点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28597da489dc639750523c83fbc11c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e99aae9fa3f0cd6405461b8db163e8.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aabee6b0c633ffd42f01af2e1fb8a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75dc7cef548ba1fda2b082733baae52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7b450a34-8cb3-451c-9f80-d35ae0238ac3.png?resizew=131)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb0f9de2f087af7ef18ee9184d88b51.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69fbd5a9df4c0210604cf1ae2fa7e0c.png)
您最近一年使用:0次
2019-01-23更新
|
508次组卷
|
5卷引用:【市级联考】湖北省十堰市2019届高三元月调研考试理科数学试题
名校
2 . 如图,直三棱柱
,点M是棱
,上不同于
的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/879d648d-aa19-4440-b19f-b69a6b4e5736.png?resizew=135)
(I)证明:
;
(Ⅱ)若
,判断点M的位置并求出此时平面
把此棱柱分成的两部分几何体的体积之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf07e06e65aa75843068a69e966ab8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923f4610ef5693634afd611217b16aff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/879d648d-aa19-4440-b19f-b69a6b4e5736.png?resizew=135)
(I)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb2309d4f3e1154a2b929dff6b5e949.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5bb651de94f5da87df67d22aee4e8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67d36d29ac86703724d98da567659ec.png)
您最近一年使用:0次
2019-01-21更新
|
633次组卷
|
3卷引用:2019届湖北省黄冈中学高三适应性考试数学(文)试题
3 . 如图,在等腰直角
中,沿斜边
上的高
将
折起到
的位置,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/128a5e5b-d088-4204-91a0-7792f6febddc.png?resizew=302)
(1)求证:
;
(2)若
为
的中点,
,三棱锥
的表面积为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e2a5a8708c06d509c766863a4d6279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/128a5e5b-d088-4204-91a0-7792f6febddc.png?resizew=302)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d31767eb718a0327eca546fe6a189cb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9829fc6685b59fdc609f32f30ebd9e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52733a34ae1636e3f9c2ecb9bd3746b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1112ffa328ed486ffc5e4a605eb510e.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,
,
,
,且PC=BC=2AD=2CD=2
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/997728a6-68e7-4111-b26a-5f6d68ede25a.png?resizew=204)
(1)
平面
;
(2)已知点
在线段
上,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/997728a6-68e7-4111-b26a-5f6d68ede25a.png?resizew=204)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8676b624f105072a3185911b25c912dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
您最近一年使用:0次
5 . 如图,三棱锥
中,△ABC是正三角形,DA=DC.
(Ⅰ)证明:AC⊥BD;
(Ⅱ)已知
,求点C到平面ABD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
(Ⅰ)证明:AC⊥BD;
(Ⅱ)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cbc53573a6633b42308a94e28c916a.png)
![](https://img.xkw.com/dksih/QBM/2018/8/29/2020746025082880/2021124131020800/STEM/6791c920a04948438f387b2f0fa901f9.png?resizew=145)
您最近一年使用:0次
2018-08-29更新
|
377次组卷
|
2卷引用:2020届湖北名师联盟高三上学期第一次模拟考试数字(文)试题
名校
6 . 如果有一天我们分居异面直线的两头,那我一定穿越时空的阻隔,画条公垂线向你冲来,一刻也不愿逗留.如图1所示,在梯形
中,
//
,且
,
,分别延长两腰交于点
,点
为线段
上的一点,将
沿
折起到
的位置,使
,如图2所示.
![](https://img.xkw.com/dksih/QBM/2018/6/2/1958637280600064/2001040938942464/STEM/e6db4d788d40467b976c0fdef6d06da1.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2018/6/2/1958637280600064/2001040938942464/STEM/2437b18a7b544db1a59be6175f351b5a.png?resizew=175)
(1)求证:
;
(2)若
,
,四棱锥
的体积为
,求四棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f7be7700b3b4177237b841636ccc5d.png)
![](https://img.xkw.com/dksih/QBM/2018/6/2/1958637280600064/2001040938942464/STEM/e6db4d788d40467b976c0fdef6d06da1.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2018/6/2/1958637280600064/2001040938942464/STEM/2437b18a7b544db1a59be6175f351b5a.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206b3689e55f0ad11910f7a5519671af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db2b1c641b93caae9b7a82441e4ba70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7dc603317eb90974c75efec9f02b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db2b1c641b93caae9b7a82441e4ba70.png)
您最近一年使用:0次
7 . 如图,在Rt
中,
,点
、
分别在线段
、
上,且
,将
沿
折起到
的位置,使得二面角
的大小为
.
(1)求证:
;
(2)当点
为线段
的靠近
点的三等分点时,求
与平面
所成角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa1c07becd03537beeb09a31745cf5.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bd9e8b54864ca44115d24a5aeeb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f201a40fedca4ad14db193f4db2127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1c4ed7451103f0cbf14bb9ae219b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51c49eed6d720f2dc30cf1a79721bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901807738150912/1902197858361344/STEM/fef8f437c8f148e8a508e66d289256ae.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901807738150912/1902197858361344/STEM/45d68d0767d340ac9d9d680dddac3f5b.png?resizew=419)
您最近一年使用:0次
8 . 如图,在
中,
,点
、
分别在线段
、
上,且
,将
沿
折起到
的位置,使得二面角
的大小为
.
(Ⅰ)求证:
;
(Ⅱ)当点
为线段
的靠近
点的三等分点时,求四棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7845fd89477ecc808e5519317fff78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa1c07becd03537beeb09a31745cf5.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bd9e8b54864ca44115d24a5aeeb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f201a40fedca4ad14db193f4db2127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1c4ed7451103f0cbf14bb9ae219b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51c49eed6d720f2dc30cf1a79721bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
(Ⅱ)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8543d05c70570e6114765efaf98a10f.png)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901807704326144/1902182846529536/STEM/2be3eec443a94e979d2c9d975f35e4bb.png?resizew=279)
您最近一年使用:0次
名校
解题方法
9 . 某四棱锥的三视图如图所示,其中正视图是斜边为
等腰直角三角形,侧视图和俯视图均为两个边长为1的正方形,则该四棱锥的高为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/3d0e54f0-c72d-4eae-b0ca-1de430db4b81.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/3d0e54f0-c72d-4eae-b0ca-1de430db4b81.png?resizew=148)
A.![]() | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
2018-03-04更新
|
605次组卷
|
3卷引用:湖北省武汉市2018届高中毕业生二月调研测试文科数学试题
10 . 如图是某直三棱柱被削去上底后的直观图与三视图的侧视图、俯视图,在直观图中,M是BD的中点,
,侧视图是直角梯形,俯视图是等腰直角三角形,有关数据如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/615d4960-9f6e-484f-97bb-e2a639af2bfa.png?resizew=317)
(Ⅰ)求证:EM∥平面ABC;
(Ⅱ)求出该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f35527ec68609d06c63c7be4ed036f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/615d4960-9f6e-484f-97bb-e2a639af2bfa.png?resizew=317)
(Ⅰ)求证:EM∥平面ABC;
(Ⅱ)求出该几何体的体积.
您最近一年使用:0次