(1)用配方法解方程:
.
(2)如图,在等腰
中,
是顶角
的角平分线,
是腰
边上的高,垂足为点E.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccfbbc513adf6f7eea45c1eb7c292ba.png)
(2)如图,在等腰
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d844f8952d9db81a5ff1dbabd71639a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/1d65cf9d-2ad1-4e74-9308-c66a0e49db05.jpg?resizew=100)
更新时间:2023-12-11 14:42:23
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相似题推荐
解答题-问答题
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【推荐2】用适当方法解下列方程
(1)
;
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8803d065d7da9f557bb9c2f9561de313.png)
(3)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b04226b39df2f67ba1c8f0bef304d8e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8803d065d7da9f557bb9c2f9561de313.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd5c9992b812af31aaccd1e8edaa7d7.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587ea34c812fd2b3fe5aff9341103653.png)
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【推荐1】已知在等边三角形
的三边上,分别取点
,
,
.
(1)如图,若
,求证:
;
![](https://img.xkw.com/dksih/QBM/2023/1/1/3143465619496960/3145019372904448/STEM/91cb6a76a7d049f2902c09ebccc71968.png?resizew=148)
(2)如图,若
于点
,
于
,
于
,且
,求
的长;
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)如图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bcb4e1c3913b81c0096f1a14096d677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581c385ab22fcf2788bd9cd1ea9f55fd.png)
![](https://img.xkw.com/dksih/QBM/2023/1/1/3143465619496960/3145019372904448/STEM/91cb6a76a7d049f2902c09ebccc71968.png?resizew=148)
(2)如图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8daff96303a07819bd4ee47731e73b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc42287f66ae7c6c569eb8fa5a991e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2023/1/1/3143465619496960/3145019372904448/STEM/2a573714cd3b468b96d70da00b837dd7.png?resizew=142)
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【推荐2】如图甲,在
中,
为锐角,点
为射线
上一动点,连接
,以
为一边且在
的右侧作正方形
.解答下列问题:
,
,
①当点
在线段
上时(与点
不重合),如图乙,线段
、
之间的位置关系为______,数量关系为______.
②当点
在线段
的延长线上时,如图丙,①中的结论是否仍然成立,为什么?
(2)如果
,
,点
在线段
上运动.试探究:当
满足一个什么条件时,
(点
、
重合除外)?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
①当点
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eab933fd3ed8a3a412a6f268d4cef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5306ee783ec381da6c03d4fb7ecb4395.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cda3d82614321b58cde7bbde4ad13eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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解答题-证明题
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适中
(0.65)
【推荐1】在
中,
,
是边
的中点,以
为角的顶点作
.如图1,射线
经过点
,
交边
于点
.
(1)不添加辅助线,请直接 写出图1中所有与
相似的三角形;
(2)如图2,将
从图1中的位置开始,绕点
按逆时针方向旋转(旋转角不大于
),射线
,
分别交
,
于点
,
.
①求证:
;
②如图3,若
,
,在线段
上有一点
,且
,若点
始终在
内(包括边界上),求
的取值范围;
③若
,直接 写出旋转角为多少度时,
与
相似.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](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/8a82ee027609d9ae01b83dc727b0c171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/107554f2-92dd-4ec1-af89-7734f65bee0d.png?resizew=474)
(1)不添加辅助线,请
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a54e7b35c73ee578c4d01479ddb74cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9d1650957a250c0c5bcfba9016d853.png)
②如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb262f3529a3e84959fe594b6628c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e713f0ba80e87438cf6273fb00cb81a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a54e7b35c73ee578c4d01479ddb74cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dc1940d0243748751d219b4707098b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,在
中,
,
,点
是
上的一点,且
,
,垂足分别为点
、
,求证:
垂直平分
.
![](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/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/8245d155-cb50-4877-8e8f-c090226e5473.png?resizew=162)
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【推荐2】如图,在平面直角坐标系中,以坐标原点O为圆心,2为半径画圆,P是⊙O上一动点且在第一象限内,过点P作⊙O的切线,与x、y轴分别交于点A、B.
(1)求证:△OBP与△OPA相似;
(2)当点P为AB中点时,求出P点坐标;
(3)在⊙O上是否存在一点Q,使得以Q,O,A、P为顶点的四边形是平行四边形.若存在,试求出Q点坐标;若不存在,请说明理由.
(1)求证:△OBP与△OPA相似;
![](https://img.xkw.com/dksih/QBM/2018/4/4/1917039638364160/1918487769432064/STEM/632701c0623f40589dde8962f867e45d.png?resizew=5)
(3)在⊙O上是否存在一点Q,使得以Q,O,A、P为顶点的四边形是平行四边形.若存在,试求出Q点坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/4/4/1917039638364160/1918487769432064/STEM/17b19feb34244e3aaefffb7c18d8d9ba.png?resizew=234)
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