已知
和
都是等腰三角形,且
,
,
.
(1)[初步感知
如图①,当点
、
分别落在边
、
上时,那么
______
填
、
或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4a42e8fb5834583d6545c6fb572d05.png)
(2)
发现证明
如图②,将图①中的
绕点
旋转,当点
在
外部,点
在
内部时,求证:
;
(3)[深入研究
如图③,如果
和
都是等边三角形,且点
、
、
在同一条直线上,则
的度数为______;线段
、
之间的数量关系为______;
(4)[拓展应用
如图④,如果
和
都是等腰直角三角形,
,点
、
、
在同一直线上,作
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43651721f6c0ea4cf50a33054ecc5d60.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/14/4ded90ef-f624-4e3f-aeb1-1a7ab53d78fa.png?resizew=442)
(1)[初步感知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880a3ea98a4c526b187919fa6b1ab4a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4a42e8fb5834583d6545c6fb572d05.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934abdab2cb16e0adea3442c65587bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4418f84bd8fca1bcabb6d0ce3dc5b14d.png)
(3)[深入研究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(4)[拓展应用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc91d24995f16acfb67b775805c9821a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e7f748d88b4eadfd1643c6b31fdf08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9ad150cb1e4cd8977d4cc3d99be17c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
更新时间:2023-09-12 15:13:30
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知△ABC为等边三角形,D为BC延长线上的一点,CE平分∠ACD,CE=BD,求证:△ADE为等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/c793b015-7bd9-4481-9783-92d11559d250.png?resizew=144)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在Rt△ABC中,∠ACB=90°,∠ABC=30°,以AB为一边向上作等边三角形 ABD,点E在BC垂直平分线上,且EB⊥AB,连接 CE,AE,CD.
![](https://img.xkw.com/dksih/QBM/2022/2/19/2919799525146624/2923939529678848/STEM/4942ba93-2269-4dd5-8a07-f896bebdb344.png?resizew=116)
(1)判断△CBE的形状,并说明理由;
(2)求证:AE=DC;
(3)若CD与AE相交于点F,CD与AB相交于点G,求∠AFD的度数.
![](https://img.xkw.com/dksih/QBM/2022/2/19/2919799525146624/2923939529678848/STEM/4942ba93-2269-4dd5-8a07-f896bebdb344.png?resizew=116)
(1)判断△CBE的形状,并说明理由;
(2)求证:AE=DC;
(3)若CD与AE相交于点F,CD与AB相交于点G,求∠AFD的度数.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
为等边三角形,D为BC边上一动点(不与B、C重合),∠DAE=60°,过点B作BE∥AC,交AE于点E.
(1)求证:
;
(2)求证:
为等边三角形;
(3)当点D在何处时,AE⊥BE?指出点D的位置,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960d61e0d9a749cba705359a15e683d2.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)当点D在何处时,AE⊥BE?指出点D的位置,并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/7/28/2515551378137088/2515850102702080/STEM/222875f44f98419882dd65a90da83c5b.png?resizew=224)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,已知矩形
,点
是边
边上一点.
(1)如图1,将矩形
沿着直线
翻折,点
恰好落在
上,其对称点记为点
,
,
,求
长;
(2)如图2,请利用圆规和无刻度直尺在边
上找一点
,使得
.(在图中标明相应字母,保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/12/2298d152-bf8a-48cb-ad0e-31595c1b2239.png?resizew=331)
(1)如图1,将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)如图2,请利用圆规和无刻度直尺在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd33cfeb587778660f3242eb5acdadd.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,已知锐角
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/eb59d768-293a-4efe-adb9-a7cfa93c5880.png?resizew=389)
(1)请在图1中用无刻度的直尺和圆规作图:作
的平分线CD;作
的外接圆
;(不写作法,保留作图痕迹)
(2)在(1)的条件下,若
,
的半径为5,则
___________.(如需画草图,请使用图2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/eb59d768-293a-4efe-adb9-a7cfa93c5880.png?resizew=389)
(1)请在图1中用无刻度的直尺和圆规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441c24e0a11985c6c0db8fde3532cddc.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,四边形
中,
,
,过
、
、
三点的圆交
于点
,交
于点
.
为矩形;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85719346f464a101d365d42be27450a3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次