我国南宋时期著名的数学家秦九韶在其著作《数书九章》中,提出了已知三角形三边长求三角形面积的公式.在
中,设
分别为
的内角
的对边,S表示
的面积,其公式为
.若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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2023·浙江·模拟预测 查看更多[2]
更新时间:2023-02-04 10:39:49
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【推荐1】△ABC的内角A,B,C的对边分别为a,b,c,已知A-C=90°,
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【推荐2】在
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【推荐1】已知
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【推荐1】已知
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