如图,
ABC中,
于
,
,若点
为
的中点,点
为线段
延长线上一动点,连结
,将
绕着点
按顺时针方向旋转
,交线段
延长线于点
,回答下列问题:
;
(2)
的值是否发生变化?若发生变化,请求出该值的取值范围;若不变化,请求出该值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d66526eaa2d194cca107fedb09c7802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f3175a979c2f908d6c5665e14894b0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61f560d0304eab60c52987ade8c27d9.png)
更新时间:2024-05-17 13:40:49
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图①,已知矩形
的对角线
的垂直平分线与边
,
分别交于点E,F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/7/f72c322f-2acd-487c-9814-3ba98c8be17d.png?resizew=488)
(1)求证:四边形
是菱形;
(2)如图②,直线
分别交矩形
的边
,
于点E,F,将矩形
沿
翻折,使点C的对称点与点A重合,点D的对称点为
,若
,
,求
的长;
(3)如图③,直线
分别交
的边
,
于点E,F,将
沿
翻折,使点C的对称点与点A重合,点D的对称点为
,若
,
,
,则五边形
的周长为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/7/f72c322f-2acd-487c-9814-3ba98c8be17d.png?resizew=488)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766e5eb6796dafc5ffe212afdfc43c0.png)
(2)如图②,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.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/49b50357a6545cae8348e3059312f520.png)
(3)如图③,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6704cfed31bef23cb01057a5026bd99.png)
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,四边形
是平行四边形,点E在
上,请仅用无刻度直尺按要求作图(保留作图痕迹,不写作法)
(1)在图1中,过点E作直线
将四边形
的面积平分;
(2)在图2中,
,作
的平分线
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/18/c3173e6f-fc24-4754-b72c-51224253b7ed.png?resizew=344)
(1)在图1中,过点E作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3620030e8808da46df97330103827913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.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1】如图,已知:E是∠AOB的平分线上一点,EC⊥OB,ED⊥OA,C、D是垂足,连接CD,且交OE于点F.
(1)求证:DF=CF.
(2)若∠AOB=60º,请你探究OE,EF之间有什么数量关系?并证明你的结论.
(1)求证:DF=CF.
(2)若∠AOB=60º,请你探究OE,EF之间有什么数量关系?并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/11/3/2332614986498048/2347734682951680/STEM/9f57be429fa34c5494e047952c3d930d.png?resizew=189)
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,△ABC和△DCE都是等腰直角三角形,∠ACB=∠DCE=90°.
(1)求证:BD=AE.
(2)若∠ABD=∠DAE,AB=8,AD=6,求四边形ABED的面积.
(1)求证:BD=AE.
(2)若∠ABD=∠DAE,AB=8,AD=6,求四边形ABED的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/c46cc9b1-f0ab-4037-9e5d-2b998d4b5345.png?resizew=149)
您最近一年使用:0次