meili 发表于 2022-10-27 15:19:33

已知△ABC,用直尺和圆规画△DEF,使得△ABC≌△DEF.

<p>问题:已知△ABC,用直尺和圆规画△DEF,使得△ABC≌△DEF.
<p>答案:↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">刘济熙的回答:<div class="content-b">网友采纳  (1)作∠MEN=∠ABC;  (2)以E点为圆心,BC长为半径画弧,交EN于F;  (3)以E点为圆心,以BA长为半径画弧交EM于D,连接DF.  则△DEF就是所求的三角形.
页: [1]
查看完整版本: 已知△ABC,用直尺和圆规画△DEF,使得△ABC≌△DEF.