如图,点P在等边
内,点
在
外,分别连结接
,
.
;
(2)连接
,求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6305a006c4483eb0572d524d1ae0ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b86ca65dca69e524e1486cfbde9d6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e49fc3110ba8df05c342a21fc7e3eb.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
更新时间:2024-05-07 17:00:59
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】(1)如图,已知,正方形
和正方形
,点G在
边上,点E在
边上,则
与
的数量关系为________;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/8a16cb04-21de-4af3-ba60-de7d7807f91c.png?resizew=137)
(2)将(1)中的正方形
绕点C旋转至下图时,(1)中的结论是否成立?若成立,请给以证明;若不成立,请说明理由;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/583680e2-ccb9-4e1f-bdcb-04e06b6d0a76.png?resizew=151)
(3)若
,
,将(1)中正方形
绕点C旋转
度(
),当B,E,G三点在一条直线上时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/8a16cb04-21de-4af3-ba60-de7d7807f91c.png?resizew=137)
(2)将(1)中的正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/583680e2-ccb9-4e1f-bdcb-04e06b6d0a76.png?resizew=151)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefaa03a2be71c9fc509b5b309d1c6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3acee288e75061ac72203b09fce29904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4238815f530f649275de714b7231f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/1145af22-ea96-4ae8-834b-45a186c72b28.png?resizew=151)
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
中,
,
,
平分
交
于点
,点
是
上一点且
.
![](https://img.xkw.com/dksih/QBM/2023/5/31/3249624192802816/3250557699792896/STEM/215ed7270a944f51816d3ab1aa56887d.png?resizew=259)
(1)求
的大小(用含
的式子表示);
(2)连接
,用等式表示线段
与
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea5fc123e77e1fb32a64ca66a75f49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab3d50ac6ff2adff11559375f419f94.png)
![](https://img.xkw.com/dksih/QBM/2023/5/31/3249624192802816/3250557699792896/STEM/215ed7270a944f51816d3ab1aa56887d.png?resizew=259)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36719f1e764ee0e719b65c49fae84677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】已知
是等边三角形,点P为射线
上任意一点(点P与点A不重合).连接
,将线段
绕点C顺时针旋转
得到线段
,连接
并延长交射线
于点E.
时,求证:
;
(2)如图2,当
,且
,点E恰好与点A重合.若
.求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b922c7fc50a56933a6cb9d80b1e7bb6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d914f3580061ba08fa9e486e34bf1ce1.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b2e60ca7d6ace337e3f066b60830e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2143fad9cec2734123b2e453756279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.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,△AOB是边长为4的等边三角形,过点A的直线
与x轴交于点C.
(1)求点A的坐标;
(2)求直线AC的函数表达式;
(3)若点P(m,n)是线段AC上的动点(不与A、C重合),设△ABP的面积为S,求S关于m的函数表达式及m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cdc49612aced88f917f9152edd7f50.png)
(1)求点A的坐标;
(2)求直线AC的函数表达式;
(3)若点P(m,n)是线段AC上的动点(不与A、C重合),设△ABP的面积为S,求S关于m的函数表达式及m的取值范围.
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757583742574592/2821989116944384/STEM/6478046846cf41c9a0d83a2969548b99.png?resizew=184)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
是边长为
的等边三角形,动点P从点B出发以
速度沿着
向终点B运动,同时动点Q从点C出发以
速度沿着
向终点C运动,运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/1da0a239-4f20-4308-9082-1e6814d28721.png?resizew=148)
(1)当P在
边上运动时,
________,
_______.
(2)当
//
时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79789686104cab147c239d152271e076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531c1a5af0bf1eeb072ae7c10e85f531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e063f5cd98ca4ddc3b331ed1336f45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/1da0a239-4f20-4308-9082-1e6814d28721.png?resizew=148)
(1)当P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9985eaef9e31b243d5aaf89b71f66075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf757b473eb160e42173982184ac5b9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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,在△ ABC 中, D 为 AC 边上一点, DE ⊥ AB 于 E , ED 延长后交 BC 的延长线于 F.
![](https://img.xkw.com/dksih/QBM/2019/12/22/2360499367215104/2360851674857472/STEM/68440113ad0f4d76a2f6207280e83bcc.png?resizew=140)
求证:(1)若 CD = CF ,则△ ABC 为等腰三角形;
(2)若 CD = CF 且∠ F = 30 °,则△ ABC 为等边三角形.
![](https://img.xkw.com/dksih/QBM/2019/12/22/2360499367215104/2360851674857472/STEM/68440113ad0f4d76a2f6207280e83bcc.png?resizew=140)
求证:(1)若 CD = CF ,则△ ABC 为等腰三角形;
(2)若 CD = CF 且∠ F = 30 °,则△ ABC 为等边三角形.
您最近一年使用:0次