名校
解题方法
1 . 在
中
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4552822970ef94db1e3ed75031ae2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.直角三角形 | B.三边均不相等的三角形 |
C.等边三角形 | D.等腰非等边三角形 |
您最近一年使用:0次
2021-08-12更新
|
602次组卷
|
7卷引用:天津市静海区第一中学2019-2020学年高一(3月)学生学业能力调研考试数学试题
解题方法
2 . 在平行四边形
中,
,
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34e6e119b3d828c7246f909ec4e9810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d030cff8d01329d115069edc4b7ed677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 如图,在
中,
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3186fa91234bddb1109b92c7708fc175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc603ed06b61fa3bca49e878600d91b6.png)
![](https://img.xkw.com/dksih/QBM/2020/3/10/2416414634360832/2416491476549632/STEM/e0d760365eae4c39b1aa96d1b2b8897d.png?resizew=126)
您最近一年使用:0次
名校
解题方法
4 . 已知向量
和
满足
,
与
的夹角为
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f9df42552e714a5212708a04e160f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39d1d88189726ae99c309644fca3494.png)
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2012高一下·浙江嘉兴·学业考试
5 . 已知平面四边形
中,
,
,向量
的夹角为
.
(1)求
;
(2)点E在线段BC上,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93313b21ed3170e61dba7953c8c77435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064d35d41ab2d316b9b3a5edf91a7542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd19d458d51304d5b5709003af66e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf586f28e8fbdd8c30227f60d1aba660.png)
(2)点E在线段BC上,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8bcec03f051757bb3f98b0ba4fba1eb.png)
您最近一年使用:0次