如图,在等边三角形
中,点
在边
上,点
在边
的延长线上,以
为一边作等边三角形
,连接
.
![](https://img.xkw.com/dksih/QBM/2024/1/25/3418913475010560/3422195959939072/STEM/22a280271a0740ceae46700d853cc3a1.png?resizew=237)
(1)若
,求证:
;
(2)试探究:线段
、
、
三者之间的数量关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2024/1/25/3418913475010560/3422195959939072/STEM/22a280271a0740ceae46700d853cc3a1.png?resizew=237)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0916a72324358517874dc3c22bc1a7bd.png)
(2)试探究:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
更新时间:2024-01-31 13:35:59
|
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【推荐2】已知:如图,在菱形ABCD中,E、F分别是边AB和BC上的点,且
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【推荐1】如图,在
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【推荐2】如图,在△ABC中,∠ACB=90°,∠A=30°,AB的垂直平分线分别交AB和AC于点D,E,连接CD.
![](https://img.xkw.com/dksih/QBM/2023/11/23/3374244730060800/3374974828216320/STEM/060b1a9ea6c84e48a8593e669385859e.png?resizew=108)
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(1)求证:△BCD是等边三角形;
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您最近一年使用:0次
解答题-证明题
|
较易
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【推荐1】已知:如图,在
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与边
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/92b6edee-846a-49c5-a732-2a63b9f63dea.png?resizew=158)
(1)求证:
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(2)若
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______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/92b6edee-846a-49c5-a732-2a63b9f63dea.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb8015df9744ca1df1f736a1ce20b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图,
、
、
、
是
上的四个点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/35be4f36-5028-4af0-aa11-7daff65a8c82.png?resizew=120)
(1)判断
的形状,并证明你的结论;
(2)探究
、
、
之间的数量关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/35be4f36-5028-4af0-aa11-7daff65a8c82.png?resizew=120)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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