如图,在中,
,
,
是
上一点,满足
.
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
证明:∵_________,
∴.
在与
中,
,
∴.
∴______,
.
∵,
∴(______).
∴.
∵,
∴.
∴_______.
∴.
更新时间:2024-03-29 21:03:52
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【推荐1】如图,△ABC是等边三角形,D是AB边上的一点,以CD为边作等边三角形CDE,使点E,A在直线DC的同侧,连接AE.
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【推荐2】如图,点B、C、E、F在同一直线上,点A、D在
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【推荐1】如图,在△ABC中,∠A=90°,∠C=30°,求作∠ABC的平分线交AC于点D,并求证:DC=DB.(要求尺规作图,并保留作图痕迹,不写作法)
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(1)在射线
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(2)画
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】如图,在
中,已知
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于点M,
与
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的中点,连接
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
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(2)请探究线段
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