题型:填空题
难度:0.85
引用次数:215
题号:19984322
用直尺和圆规作一个角等于已知角的示意图如图所示,则说明
的依据是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27949b9eac364001ddbd7ec0ef2e0142.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/25/fc76545d-ec50-4a99-b1c1-5c47fd545663.png?resizew=333)
更新时间:2023-08-28 13:38:22
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【推荐1】用直尺和圆规作一个角等于已知角的示意图如图所示,根据____ 可知△C′O′D'≌△COD,则说明∠A′O′B′=∠AOB.
![](https://img.xkw.com/dksih/QBM/2021/11/9/2847355083472896/2848048526655488/STEM/1225f47e-1dee-495f-982f-1ceff5a1d71d.png)
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【推荐2】下面是小东设计的“过直线外一点作这条直线的平行线”的尺规作图过程.已知:直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
求作:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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作法: (1)在直线 ![]() ![]() (2)连接 ![]() (3)以 ![]() ![]() ![]() ![]() ![]() (4)以 ![]() ![]() ![]() ![]() (5)以 ![]() ![]() ![]() (6)作直线 ![]() ![]() 所以,直线 ![]() |
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