(1)【操作发现】如图①,D是等边
的边BA上一动点(点D与点B不重合),连接
,以
为边在
上方作等边
,连接
.线段
与
之间的数量关系是______.
(2)【类比猜想】如图②,当动点D运动至等边
边
的延长线上时,其他作法与(1)相同,猜想
与
在(1)中的结论是否仍然成立?并加以证明;
(3)【深入探究】如图③,当动点D在等边
边BA上运动时(点D与点B不重合),连接
,以
为边在
上方、下方分别作等边
和等边
,连接
,
,探究AF,
与AB有何数量关系?并证明你的探究的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)【类比猜想】如图②,当动点D运动至等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)【深入探究】如图③,当动点D在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/609816ff89ecbb321d42b44ccc97247c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a60bbddc1f1e13ff48801917c503ad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a60bbddc1f1e13ff48801917c503ad4.png)
更新时间:2021-12-06 07:47:42
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,等边三角形
边长为2,点
是直线
上一点,连接
,将
绕点
逆时针旋转
后得到
.连接
与
交于点
.
,求线段
的长;
(2)连接
.
①记点
的运动路径为
.试判断
与
的位置关系;
②在点
在运动的过程中,
是否有最小值?如果有,请求出,并求此时
的值;如果没有,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d26633cc499d15d86afb2f54a492cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①记点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
②在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9ca97c8cd8eac7f583630a9b0f38fe.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】已知,如图在
中,对角线AC和BD相交于点O,点E,F分别在OD,BO上,且OE=OF,连接AE,CF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/701d82d2-2daf-4121-8ff3-a61c1b8eb4fb.png?resizew=458)
(1)如图1,求证:AE=CF;
(2)如图2,延长AE交CD于点G,延长CF交AB于点H.求证:AH=CG.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/701d82d2-2daf-4121-8ff3-a61c1b8eb4fb.png?resizew=458)
(1)如图1,求证:AE=CF;
(2)如图2,延长AE交CD于点G,延长CF交AB于点H.求证:AH=CG.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,等边三角形
中,
是
上的高,
,图中有哪些与
相等的线段?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在等边
中,点
是线段
上的一个点,连接
,以
为边,作等边
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/08a6d329-303e-46fc-9d3d-92ba2199c16d.png?resizew=177)
(1)求证:
;
(2)如图,当
点在射线
上时(
点的右边),
是否仍然成立,请说明理由;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/8f5841c7-a099-4b06-8575-8e58d9c5c08c.png?resizew=240)
(3)如图,当
点在射线
上时(
点的左边),若
,则
的度数是多少?
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/08a6d329-303e-46fc-9d3d-92ba2199c16d.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
(2)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/8f5841c7-a099-4b06-8575-8e58d9c5c08c.png?resizew=240)
(3)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/82e1b6d9-9ceb-491f-a889-988e4901ee0a.png?resizew=265)
您最近一年使用:0次