中国古代数学家刘徽在《九章算术注》中,给出了证明三角形面积公式的出入相补法.如图所示,在
中,分别取
的中点D、E,连接
,过点A作
于F,将
分割后拼接成矩形
.若
,则
的面积是_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66536b6d4dd18013c97f385c3224416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370b522b0bf97842568b7123557e1625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
2022·陕西·三模 查看更多[3]
更新时间:2022-05-26 14:45:30
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