如图所示,把一张长方形纸片ABCD沿EF折叠,若角EFG=50°,求角DEG和∠BGD'的度数class="ikqb_img" src="http://d.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=c7dd34818cb1cb133e3c3415ed647a76/b7003af33a87e950c65fac0211385343fbf2b410.jpg
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 04:31:26
![如图所示,把一张长方形纸片ABCD沿EF折叠,若角EFG=50°,求角DEG和∠BGD'的度数class=](/uploads/image/z/3801759-15-9.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%8A%8A%E4%B8%80%E5%BC%A0%E9%95%BF%E6%96%B9%E5%BD%A2%E7%BA%B8%E7%89%87ABCD%E6%B2%BFEF%E6%8A%98%E5%8F%A0%2C%E8%8B%A5%E8%A7%92EFG%3D50%C2%B0%2C%E6%B1%82%E8%A7%92DEG%E5%92%8C%E2%88%A0BGD%27%E7%9A%84%E5%BA%A6%E6%95%B0class%3D%22ikqb_img%22+src%3D%22http%3A%2F%2Fd.hiphotos.baidu.com%2Fzhidao%2Fwh%253D600%252C800%2Fsign%3Dc7dd34818cb1cb133e3c3415ed647a76%2Fb7003af33a87e950c65fac0211385343fbf2b410.jpg)
如图所示,把一张长方形纸片ABCD沿EF折叠,若角EFG=50°,求角DEG和∠BGD'的度数class="ikqb_img" src="http://d.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=c7dd34818cb1cb133e3c3415ed647a76/b7003af33a87e950c65fac0211385343fbf2b410.jpg
如图所示,把一张长方形纸片ABCD沿EF折叠,若角EFG=50°,求角DEG和∠BGD'的度数
class="ikqb_img" src="http://d.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=c7dd34818cb1cb133e3c3415ed647a76/b7003af33a87e950c65fac0211385343fbf2b410.jpg" esrc="http://d.hiphotos.baidu.com/zhidao/wh%3D450%2C600/sign=fa56b70a574e9258a6618eeaa9b2fd6e/b7003af33a87e950c65fac0211385343fbf2b410.jpg" />
如图所示,把一张长方形纸片ABCD沿EF折叠,若角EFG=50°,求角DEG和∠BGD'的度数class="ikqb_img" src="http://d.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=c7dd34818cb1cb133e3c3415ed647a76/b7003af33a87e950c65fac0211385343fbf2b410.jpg
由于是沿EF折叠
所以:∠DEF=∠D'EF,∠CFH=∠C'FH
由平行知:∠DEF=∠D'EF=∠CFH=∠C'FH=50°
所以:∠BGD'=∠BFC'=80°
∠DEG=100°