一道想破脑筋的题.
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/07/11 21:37:52
这是我同学参加成都实验外国语学校的招生考试题.我看了2天了,实在是难,求助求助啊. 在五边形中,∠B+∠E=180°,∠BAE=∠C=120°,AB=AE,求证:AD平分∠CDE
![](http://img.wesiedu.com/upload/1/44/1448b4389348570dc851596306987612.png)
![](http://img.wesiedu.com/upload/1/44/1448b4389348570dc851596306987612.png)
![一道想破脑筋的题.](/uploads/image/z/16134892-52-2.jpg?t=%E4%B8%80%E9%81%93%E6%83%B3%E7%A0%B4%E8%84%91%E7%AD%8B%E7%9A%84%E9%A2%98.)
解题思路: 利用三角形全等和旋转的性质求证。
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=595502")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
![](http://img.wesiedu.com/upload/f/b2/fb240c6aed59e9f7d42a5359959e7911.jpg)
最终答案:略
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=595502")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
![](http://img.wesiedu.com/upload/f/b2/fb240c6aed59e9f7d42a5359959e7911.jpg)
最终答案:略