名校
解题方法
1 . 如图,在三棱柱
中,
,点
,
分别是
,
的中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/d15fba4a-4074-4d04-98e2-bf2589b0c691.png?resizew=189)
(1)求证:
;
(2)求证:
//平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa712838a48f5c0cc909aa35a8d08f3.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ba5715a95b8de18c637c12c3d30d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/d15fba4a-4074-4d04-98e2-bf2589b0c691.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c453514d9c585d4f0c1bae2021eabb30.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f0d0e78101fef36a75b70ac7e7cf5b.png)
您最近一年使用:0次
2020-03-05更新
|
4777次组卷
|
10卷引用:江西省兴国县将军中学2021-2022学年高二上学期月考数学(文)试题
江西省兴国县将军中学2021-2022学年高二上学期月考数学(文)试题河南省新乡市第一中学2019-2020学年高一上学期12月月考数学试题江苏省泰州市兴化市一中2019-2020学年高一下学期期中数学试题(已下线)专题8.6 第八章《立体几何初步》单元测试(A卷基础篇)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材人教A版,浙江专用)(已下线)第六章 立体几何初步(基础过关)-2020-2021学年高一数学单元测试定心卷(北师大2019版必修第二册)(已下线)专题11.4《立体几何初步》(A卷基础篇)-2020-2021学年高一数学必修第四册同步单元AB卷(新教材人教B版)宁夏青铜峡市高级中学2021-2022学年高二上学期期中考试数学(理)试题山西省运城市景胜中学2022-2023学年高一下学期5月月考数学试题(B卷)福建省龙岩市连城县第一中学2022-2023学年高一下学期5月月考数学试题(已下线)第十三章 立体几何初步(单元重点综合测试)-单元速记·巧练(苏教版2019必修第二册)
名校
解题方法
2 . 如图,在直三棱柱
中,
,
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/36d29b39-c538-463e-9c8d-184c12f72948.png?resizew=158)
(1)求证:
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/36d29b39-c538-463e-9c8d-184c12f72948.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdb0747e3817dc6fc050f077b477f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e651b4b68d974b893f09efd44da25b43.png)
您最近一年使用:0次
2020-03-12更新
|
2486次组卷
|
2卷引用:江西省南昌市进贤县第一中学2020-2021学年高二下学期期中考试数学(文)试题
名校
3 . 如图,在边长为2的菱形
中,
,现将
沿
边折到
的位置.
![](https://img.xkw.com/dksih/QBM/2019/3/6/2154547523518464/2156127955378176/STEM/d176b8df-0a1b-4acc-a8b6-8485dd4f6a53.png)
(1)求证:
;
(2)求三棱锥
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://img.xkw.com/dksih/QBM/2019/3/6/2154547523518464/2156127955378176/STEM/d176b8df-0a1b-4acc-a8b6-8485dd4f6a53.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2019-03-08更新
|
2048次组卷
|
8卷引用:【省级联考】江西省上饶市重点中学2019届高三六校第一次联考数学(文)试卷
名校
4 . 如图,在四棱锥P−ABCD中,底面ABCD为平行四边形,平面PAD⊥平面ABCD,PA=PD,E,F分别为AD,PB的中点.
(1)求证:PE⊥BC;
(2)求证:EF∥平面PCD.
(1)求证:PE⊥BC;
(2)求证:EF∥平面PCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/3486058d-98a6-44ea-8de0-9a9a3a29bc49.png?resizew=246)
您最近一年使用:0次
2019-01-10更新
|
3531次组卷
|
4卷引用:江西省南昌县莲塘第三中学2019-2020学年下学期期末考试数学(文)试题