1 . 如图,在正方体
中,
,
,
分别是棱
,
,
的中点,则下列结论中:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/c79c1385-00f3-4774-aabb-260c5c20c809.png?resizew=147)
①
; ②
面
;
③面
面
; ④
面
.
正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/c79c1385-00f3-4774-aabb-260c5c20c809.png?resizew=147)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ea178b94b0039c40f686c77ebc9a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
③面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0e238b84af03d241e04bcf4cdf4536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
正确结论的序号是
您最近一年使用:0次
2021-01-26更新
|
594次组卷
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3卷引用:宁夏固原市隆德县2020-2021学年高一上学期期末考试数学试题
宁夏固原市隆德县2020-2021学年高一上学期期末考试数学试题(已下线)专题11.3空间中的垂直关系(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)宁夏石嘴山市平罗中学2022-2023学年高二(重点班)上学期期中考试数学(文)试题
2 . 如图,在四棱锥
中,
,
,
,
,
,
分别为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4c03f958-7255-40db-8cae-7ca51df324d3.png?resizew=150)
(1)证明:面
平面
.
(2)证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ac6208289b7346c73cde72e01004d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f82a30d6b232dc4d8f35d2d6e0e0f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3402ea855e2ae2dcd98f607bef4fdd6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c2013527c6089d7df59bca21a4598c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4c03f958-7255-40db-8cae-7ca51df324d3.png?resizew=150)
(1)证明:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8548b4b6a78b672675479fd98a4c8432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b427c2978db0670dc4cb96bffea7e1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
您最近一年使用:0次
2020-03-23更新
|
203次组卷
|
2卷引用:宁夏固原市隆德县2020-2021学年高一上学期期末考试数学试题