1 . 在平面内,将一个多边形先绕自身的顶点
旋转一个角度
,再将旋转后的多边形以点
为位似中心放大或缩小,使所得多边形与原多边形对应线段的比为
,称这种变换为自旋转位似变换.若顺时针旋转,记作
;若逆时针旋转,记作
.
例如:如图①,先将
绕点
逆时针旋转
,得到
,再将
以点
为位似中心缩小到原来的
,得到
,这个变换记作
.
经过
得到
,用尺规作出
.(保留作图痕迹)
(2)如图③,
经过
得到
,
经过
得到
,连接
,
.求证:四边形
是平行四边形.
(3)如图④,在
中,
,
,
.若
经过(2)中的变换得到的四边形
是正方形.
Ⅰ.用尺规作出点
(保留作图痕迹,写出必要的文字说明);
Ⅱ.直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90154c30ec01546ad9465f8732586703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd6807f78535bc41b8a7a7a5b9dcd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3504064647c30e357a8683bea4e6dcda.png)
例如:如图①,先将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb94bd9eb80fb9f5f02f518bb8f2211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7988923407b9abb78ef8ab45829678fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7988923407b9abb78ef8ab45829678fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabb82c46b0092947bc00bf50e875f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5849a2f61ef92609e184d07cdb8ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8a8672caa4046a10b6c44e032e6a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b185184dc2dc3894a0313fd13f26a59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b185184dc2dc3894a0313fd13f26a59.png)
(2)如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4cb41024da13cb3b26d02090983f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96715995549e5e48494101570bb3bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e10add365df4f97fd128a46f41a5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7b7be09862e90dd0065ec7b712e024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dfa01bffe6f5d08931c75970c16b69.png)
(3)如图④,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7234a1e53798d482a99239ec0ae16c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dfa01bffe6f5d08931c75970c16b69.png)
Ⅰ.用尺规作出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
Ⅱ.直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
2024-06-11更新
|
143次组卷
|
6卷引用:2023年江苏省南京市中考数学模拟预测题
2023年江苏省南京市中考数学模拟预测题(已下线)热点07 相似三角形(7大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)(已下线)专题08 几何作图问题2-2024年中考数学二轮热点题型归纳与变式演练(江苏专用)(已下线)题型02 相似三角形的应用-2(已下线)培优冲刺01 三角形中的常见模型综合训练(14模型)-【查漏补缺】2024年中考数学复习冲刺过关(全国通用)数学(江苏南京卷)-【试题猜想】2024年中考考前最后一卷
2 . 综合与实践
问题情境:
四边形
是边长为
的正方形,分别以
为边向正方形外侧构造两个等边三角形
和
.将
沿射线
平移得到
,点A、B、E的对应点分别为
、
、
,连接
,
.
(1)如图1,当点
位于
边上时,试判断四边形
的形状,并证明.
(2)如图2,当四边形
为矩形时,求
平移的距离.
(3)拓展创新:在(2)的条件下,将
绕点
顺时针旋转一定角度得到
,点
,
的对应点分别为
,
,连接
.当
时,请直接写出
的长.
问题情境:
四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646084b7f3902efa4c462ed67599265a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de353f7857ec9fc7f5f249faf0c1d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d30252720ff0a2b1f105523e9aa3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356d4349bc0500c3b20b57012a440658.png)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b1588b157a56460b28215c58a6bfa.png)
(2)如图2,当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b1588b157a56460b28215c58a6bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
(3)拓展创新:在(2)的条件下,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de353f7857ec9fc7f5f249faf0c1d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0b7f15845be7bf66749a9f91c08c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc21c1a453a13b9ad0c89589b6fcf7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
您最近一年使用:0次
2024·河南驻马店·三模
3 . 综合与实践.
问题情境:
在综合与实践课上,老师让同学们以“三角形的旋转”为主题开展探究活动.如图15,在
中,
,
,
,
为斜边
的中点,将与
全等的
绕点
旋转得到
.
操作发现:
(1)如图①,顺时针旋转一定角度,记
和
分别与
交于点E,F,当
时,猜想
和
的数量关系为______,并证明你的猜想;
(2)如图②,继续旋转一定角度,当线段
经过点B时,连接
,试判断四边形
的形状,并证明你的结论;
实践探究:
(3)在整个旋转过程中,当
在
下方,且
的直角边恰好与
垂直时,设线段
与直线
交于点G,直线
交射线
于点H,连接
,请直接写出
的长.
问题情境:
在综合与实践课上,老师让同学们以“三角形的旋转”为主题开展探究活动.如图15,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bde9258da29e3517635b1c7ef239edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b185184dc2dc3894a0313fd13f26a59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec1777a5327cb01550a2c942aeed166.png)
操作发现:
(1)如图①,顺时针旋转一定角度,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f31213ce9759756dda235a1c28ccc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0405ec053a15ff7162aaebc96c9d60b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71fe246270d1277f9eb2bf15af22e83.png)
(2)如图②,继续旋转一定角度,当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56a6468e3be2aec650f33674503cc7a.png)
实践探究:
(3)在整个旋转过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec1777a5327cb01550a2c942aeed166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec1777a5327cb01550a2c942aeed166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f31213ce9759756dda235a1c28ccc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20d5c537dfa0b53484744c7001233c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20d5c537dfa0b53484744c7001233c4.png)
您最近一年使用:0次
4 . 如图,在矩形
中,
,分别过点
,
作
,
交
于点
,
,连结
,
.
为平行四边形.
(2)分别取
,
的中点
,
,连结
,
.若
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.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/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.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/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
(2)分别取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cee0f36dc452e58086832c0152b641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ae3c1c4c25e9277470086b34abb63d.png)
您最近一年使用:0次
5 . 如图,在梯形
中,
,
,
与对角线
交于点
,
,且
.
是菱形;
(2)连接
,如果
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d004acbe0ae03123b00767ea7e38223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e29770dc2db6536f6570f44ef5152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fae5286f4db94b807b631ff00c45b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9977e550ed5d538217f54b17a477a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4acfc06939ad5c27f7b662121d645b76.png)
您最近一年使用:0次
6 . 如图①,点D为
上方一动点,且
.
左侧构造
,连接
,请证明
;
(2)如图②,在
左侧构造
,在
右侧构造
,连接
求证:四边形
是平行四边形;
(3)如图③,当
满足
,
,
.运用(2)中的构造图形的方法画出四边形
;
(Ⅰ)求证:四边形
是矩形;
(Ⅱ)直接写出在点D运动过程中线段
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50cc6b559e9fa753a78cd6d08337b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327dc76741540e02fc19992549253bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5361da222575f656cec612922d0ec08c.png)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327dc76741540e02fc19992549253bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581200dc0fd380ef38151a73a9e6372b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0684eaa9d424d04e9b78759016c393c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58646379ce2bc133b65913c6209266a5.png)
(3)如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3adedf66719874af797224549c8cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e62aa9057264b2813c4f4324cf34b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58646379ce2bc133b65913c6209266a5.png)
(Ⅰ)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58646379ce2bc133b65913c6209266a5.png)
(Ⅱ)直接写出在点D运动过程中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
您最近一年使用:0次
2024-05-27更新
|
286次组卷
|
3卷引用:四川省成都市龙泉驿区2023-2024学年九年级下学期期中数学试题
7 . 已知:如图,四边形
中,
,点
在边
上,
与
的延长线交于点
,
.
为平行四边形;
(2)联结
,分别延长
、
交于点
,如果
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931c41ebf9a20f7e6d7e9bc032745e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
(2)联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faee0268e5ede6318697e5a8509dd6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faee0268e5ede6318697e5a8509dd6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd058e0888efcfe043ad5e9076bd843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d97d8507c5a4184e0f2ea71dd419c9f.png)
您最近一年使用:0次
8 . 如图,已知:等腰梯形
中,
,
,以A为圆心,
为半径的圆与
相交于点E,与
相交于点F,联结
,设
分别与
相交于点G、H,其中H是
的中点.
为平行四边形;
(2)如图1,如果
,求
的值;
(3)如图2,如果
,求
的余弦值.
![](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/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caac78889e21a7aa302dfb59833ea48e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c00abe2cd9cb334d9ffcdf992c7ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
(2)如图1,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2465ee1fec12351943f15055dfd6ec73.png)
(3)如图2,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a564a13dd5ced1de486eeaafa2a326a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
您最近一年使用:0次
2024-05-12更新
|
311次组卷
|
3卷引用:2024年上海市金山区中考二模数学试题
2024年上海市金山区中考二模数学试题2024年湖南省益阳市沅江市两校联考中考二模数学试题(已下线)专题14 压轴25题几何综合题60题专练(含上海24年最新模拟题)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)
2024九年级下·全国·专题练习
9 . 如图(1)所示,已知在
中,
,
在边
上,点
是边
中点,以
为圆心,
为半径的圆分别交
,
于点
,
,连接
交
于点
.
,求证:四边形
为平行四边形;
(2)如图(2)所示,连接
,如果
,
,
,求边
的长;
(3)连接
,如果
是以
为腰的等腰三角形,且
,求
的值.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aef30e0197389432d370a15f31ed6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affd5a05775a72d9e28ae9ca1214aa76.png)
(2)如图(2)所示,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b7df75b5e33ad8de87a661a3618750d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763c0ed9baecf74b0498c12c6255d4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec2af6f089b9bf6214b751b59ffc38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eab2c3682886b813bb39e3b7d517a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8d944622210c6d755690da957007e.png)
您最近一年使用:0次
2024-05-12更新
|
188次组卷
|
3卷引用:重难点05 圆的综合压轴题(6大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)
(已下线)重难点05 圆的综合压轴题(6大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)(已下线)重难点05 几何压轴综合(8大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(上海专用)(已下线)专题05 圆(5大热点题型)(含24年上海最新模拟题)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)
10 . 综合实践课上,老师让同学们进行了
的折纸游戏,E是
边上的一动点,F是
边上的一动点,将
沿直线
折叠,使点C落在边
上的点
处,点D的对应点为点
,连接
.
如图1,若
,
,
__________,
_________
.
(2)操作探究
如图2,当点
落在BA的延长线上时,求证:四边形
为平行四边形.
(3)拓展探究
如图3,若
,
,
,E是
边上的一动点,F是
边上的一动点,在折叠过程中,要使点
始终落在
边上(含A,B点),请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2594e927cb7ed022acc039c3bb136d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df73bd30073edce7c03c5884564938b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7370954e60fd8b4921c57871d6494fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f661e4c3a2bbec45bd67fe08c2285e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)操作探究
如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a15bded9e34ef59ffdf5c172fa23d9.png)
(3)拓展探究
如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e850d70641692e7a8dd3c048ccf0a313.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/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次