如图,
是
的直径,
为
上一点,
在
上,且
,
的延长线与
交于点
.
![](https://img.xkw.com/dksih/QBM/2021/10/10/2826327166935040/2828245447639040/STEM/cae66228-08ee-40b6-bf59-e9d5c16c9e9c.png)
(1)求证:
;
(2)若
,
,求
的度数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/10/10/2826327166935040/2828245447639040/STEM/cae66228-08ee-40b6-bf59-e9d5c16c9e9c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e503540b986d1ce905c8bc2dfd052e0f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1394fc01d91ffe8e6826cab0c933be3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
更新时间:2021-10-13 07:03:00
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
,点
在
边上,点
在
边上,且
,连接
,当
时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb50b1fbfae0a5d56dbaab6a42d039e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4f137168291e38b45977c3369d7bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
![](https://img.xkw.com/dksih/QBM/2020/1/16/2378543832784896/2379970734211072/STEM/942eefd4b32a4b5d8729b748152bc6d5.png?resizew=178)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
.
(1)请用尺规作图法在边
上求作一点
,使
;(保留作图痕迹,不写作法)
(2)在(1)的条件下,连接
,
是
的反向延长线上一点,过点
作
交线段
于点
.若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/e199f30a-4b7b-4b3e-b273-bfb598047eca.png?resizew=207)
(1)请用尺规作图法在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6722a29b3d3fc9f0897b2ae24f35916c.png)
(2)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19766bbdc2d23ae20e9f34530c3a1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a2e6494cf8d2dff0746a9bb72cef43.png)
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解答题-问答题
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【推荐3】请认真完成下列的数学活动
我们知道,三角形的一个外角等于与它不相邻的两个内角的和,那么三角形的一个内角与它不相邻的两个外角的和之间存在怎样的数量关系呢?
●尝试探究(1)如图①,
与
分别为
的两个外角,试探究
与![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
之间的数量关系.
●初步运用(2)如图②,在
纸片中前去
,得到四边形
.若
,则
___________.小明联想到了曾经解决的一个问题:如图③,在
中,
,
分别平分外角
,
,则
与
之间的数量关系为________________(请利用上面的结论直接写出答案).
●拓展提升(3)如图④,在四边形
中,
,
分别平分外角
,
,设
.
①试说明
与
的数量关系;
②根据
值的情况,请直接判断
的形状(按角分类).
我们知道,三角形的一个外角等于与它不相邻的两个内角的和,那么三角形的一个内角与它不相邻的两个外角的和之间存在怎样的数量关系呢?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/416e6bf6-418d-4f79-9a20-96e7aaea39c2.png?resizew=636)
●尝试探究(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b55b502f406c3525ce81b60bdfdc11e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937c8fc61971aef586d7cd3073595db7.png)
●初步运用(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd75c2244c18120b8fc35d5d309ab66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ebfc76ebf913c537e1ff8a7de6403a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b72f32c44cf1347fdabd9043c5109d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b55b502f406c3525ce81b60bdfdc11e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
●拓展提升(3)如图④,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cd9d0d73549e2944578f3513631ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9222c2a8519ef3f4e80e8ca3d6a72b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2617c6ab7010b9ed65beade8ccef90a7.png)
①试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②根据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,延长
到点
,使
.
是
上一点,
,交
于点
,连结
.
(1)如图1,当
时,求证:
是
的切线;
(2)如图2,连接
.设
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc1fc39fa72c334a321129d893899a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d5ff57f147aa0628fdd47899b5a132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/19479f90-df74-4fda-a1c8-29d29c686cb5.png?resizew=381)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6607205fde49a92b9968eb8e59f17a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148e063b8ccc49f6745b32b418eb9659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396f3d6b9c3325d3980e5b4e8f39fc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23242da49a687d5928d22af9d08a18c9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,点A的坐标为
,点B、C在x轴上,且
轴,
,直线
与y轴交于点D,E是直线
上的一个动点.
的表达式;
(2)当点E在线段
上,联结
,如果
的面积是
面积的一半,求点E的坐标;
(3)设点F是平面内一点,如果以A、E、B、F为顶点的四边形为正方形,试求出点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f9673d82c79d5e4aec18b18a1f9bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624dffd30b66a5e4de57362b32b2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)当点E在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e00bf73d03dded1cf5f83cc5339361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
(3)设点F是平面内一点,如果以A、E、B、F为顶点的四边形为正方形,试求出点F的坐标.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】
是等边三角形,点E是射线
上的一点(不与点B,C重合),连接
,在
的左侧作等边三角形
,将线段
绕点E逆时针旋转
,得到线段
,连接
,交
于点M.
中点时,请直接写出线段
与
的数量关系;
(2)如图2,当点E在线段
的延长线上时,请判断(1)中的结论是否成立?若成立,请写出证明过程;若不成立,请说明理由;
(3)当
,
时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
(2)如图2,当点E在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaead91b4b6febfcdd6f995d81e550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,四边形
是正方形,
是对角线,
平分
交
于点E,交
于点M,点F是
延长线上一点,且
.
(1)求证:
且
;
(2)若正方形
的边长为2,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/ee31980f-4e57-4090-8136-15483f132ad6.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b988a736bab20406261e998320cdda.png)
(2)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b201c8ebeb1833be12a78d5607c09622.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
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【推荐1】同学们本学期在圆的章节学习中,我们接触了不少尺规作图的问题,接下来请同学们利用圆的相关知识,完成下列尺规作图问题:
(1)如图,已知
,在
内求作一点
,使
.(尺规作图,保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/8cd5e0d0-1beb-4f15-85ae-38069801ff84.png?resizew=152)
在本次尺规作图中,你所运用的圆的相关知识是:__________;
(2)已知
中,
,请在线段
上找一点
,使得
.(尺规作图,保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/9a58be07-8753-460d-b256-10aca5a561c4.png?resizew=160)
在本次尺规作图中,你所运用的圆的相关知识是:__________.
(1)如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f47e68c6166f5ad3627d9c8eda8da7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/8cd5e0d0-1beb-4f15-85ae-38069801ff84.png?resizew=152)
在本次尺规作图中,你所运用的圆的相关知识是:__________;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1675a11d53db32ea845ba3c1d760ae8b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/9a58be07-8753-460d-b256-10aca5a561c4.png?resizew=160)
在本次尺规作图中,你所运用的圆的相关知识是:__________.
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【推荐2】如图,BC是半圆的直径,AD
BC,垂足为点D,弧BA=弧AF,BF与AD交于点E.
(1)求证:AE=BE;
(2)若点A、F把半圆三等分,BC=12,求AE的长.
![](https://img.xkw.com/dksih/QBM/2014/1/20/1573699906985984/1573699913457664/STEM/0ec381f8f2ff4d66bf6608f846398c19.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/7ffcac41-507f-49d6-bac0-ce5ca686ec33.png?resizew=183)
(1)求证:AE=BE;
(2)若点A、F把半圆三等分,BC=12,求AE的长.
您最近一年使用:0次