名校
1 . 在
中,
分别是内角
所对的边,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d64a002b302b7d5163e06d3a7c6c668.png)
(其中
,且
则
的形状是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbf5887ebf0a2fb425dc594bb983585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd51c782333e04862704165622ad68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d64a002b302b7d5163e06d3a7c6c668.png)
(其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4357e24d9eca5a3305e047c0a32481eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b92840aa53cedddfa1297e17db0bf3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
A.有一个角为![]() | B.正三角形 |
C.直角三角形 | D.等腰直角三角形 |
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2016-12-04更新
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7卷引用:2016届上海市虹口区高三4月高考练习(二模)(理)数学试题