用两种方法证明“四边形的外角和等于
”
如图,
、
、
、
是四边形
的四个外角.
求证:
.
证法1:
____①____,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1555c65561bf174dabc316af45b04da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec7a44cf455e141fdcfaf648656caa3.png)
____②____,
.
请把证法1补充完整,并用不同的方法完成证法2.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2ccc34a8b3cf908af78bdbe804afac.png)
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687360c1e27d1857e15f65eb2f58d58d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6691efd192e78833c453a798bc5e6cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cebc48b43d71510f579b83fcd777ed44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06ddf51df421daac648806ee4a62bc1.png)
证法1:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1555c65561bf174dabc316af45b04da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec7a44cf455e141fdcfaf648656caa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85942760a6b2d3eaee9d83c69f9d52f0.png)
请把证法1补充完整,并用不同的方法完成证法2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/180c238c-0615-4f35-baf7-a646de3e0058.png?resizew=328)
更新时间:2023-06-08 11:16:02
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