已知在矩形ABCD中,
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/23/2968623162048512/2980850734882816/STEM/b3c10be8-01b4-424d-a55b-4289c6f9a796.png?resizew=625)
(1)如图1,点E为BC的中点,将△ABE沿AE折叠,点B落在点F处,连接CF,设
,求∠BCF的大小(用含
的式子表示);
(2)在(1)的条件下,延长CF交AD于点G,求△AFG的面积;
(3)如图2,点E是边AB上的一个动点,将△BEC沿CE折叠,点B落在点F处,连接AF,DF,当△ADF是等腰三角形时,求tan∠BCE的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://img.xkw.com/dksih/QBM/2022/4/23/2968623162048512/2980850734882816/STEM/b3c10be8-01b4-424d-a55b-4289c6f9a796.png?resizew=625)
(1)如图1,点E为BC的中点,将△ABE沿AE折叠,点B落在点F处,连接CF,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a447d8fc6919edd758ccec4277435aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)在(1)的条件下,延长CF交AD于点G,求△AFG的面积;
(3)如图2,点E是边AB上的一个动点,将△BEC沿CE折叠,点B落在点F处,连接AF,DF,当△ADF是等腰三角形时,求tan∠BCE的值.
2022·江苏南通·一模 查看更多[6]
2022年江苏省南通市如东县中考一模数学试题(已下线)2022年江苏省宿迁市中考数学变式题24-28(已下线)黄金卷03-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江苏南通专用)2023年江苏省扬州市广陵区中考二模数学试卷江苏省扬州市邗江区梅苑双语学校2023-2024学年九年级上学期1月期末数学试题2024年云南省初中学业水平考试 数学模拟预测题(一)
更新时间:2022-05-16 21:39:15
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解题方法
【推荐1】已知抛物线y=ax2+bx+3的图象与x轴相交于点A和点B(1,0),与y轴交于点C连接AC,有一动点D在线段AC上运动,过点D作
轴的垂线,交抛物线于点E,交
轴于点F,AB=4,设点D的横坐标为m.
(1)求抛物线的解析式.
(2)连接AE、CE,当△ACE的面积最大时,求点D的坐标.
(3)当m为何值时,△CDE是等腰三角形.
(4)连接BC,当∠EAD=∠OCB时,请直接写出此时点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求抛物线的解析式.
(2)连接AE、CE,当△ACE的面积最大时,求点D的坐标.
(3)当m为何值时,△CDE是等腰三角形.
(4)连接BC,当∠EAD=∠OCB时,请直接写出此时点D的坐标.
![](https://img.xkw.com/dksih/QBM/2021/1/28/2645900987752448/2650955822129152/STEM/bcf09f12-b8c7-4d15-a783-2cb62bce47fd.png)
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名校
【推荐2】如图,在正方形
中,
为边
上一点(点
不与点
重合),连接
,作点
关于直线
的对称点
,连接
分别交
于点
,过点
作
于点
,连接
.
(2)求证:
;
(3)连接
,用等式表示线段
,
,
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0520e9675bc1b416e8b8f01eb69fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3311dd0802abf156edde4d33a530f504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f3ed5ea1cf0fa8f7c6be46cd5fa057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c23e376ab222814e0029d2adb5a957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab618c936da03808cb9953783d42b30.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7424552671f568ae018f42336432413d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
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【推荐1】综合与实践:
在一次数学活动课上,老师带领学生对矩形纸片进行如下操作:
![](https://img.xkw.com/dksih/QBM/2023/9/2/3315876055195648/3325234313355264/STEM/cda2548ff8684c5db1c3248310a780da.png?resizew=550)
(1)探究一:
如图1,矩形纸片
中,
.如图2,点P在
上,点Q在
上,
,将纸片沿
翻折,使顶点C落在矩形
内,对应点为
的延长线交直线
于点M,再将纸片的另一部分翻折,使顶点A落在直线
上,对应点为
,折痕为
.猜想
,
之间的位置关系为:
(2)探究二:
如图3,将纸片任意翻折,折痕
(P在
上,Q在
上),使顶点C落在矩形
内,对应点为
的延长线交直线
于点M,再将纸片的另一部分翻折,使顶点A落在直线
上,对应点为
,折痕为
.猜想
,
之间的位置关系,并给出证明.
(3)探究三:
如图4,若
,
,
,当P为
的三等分点时,直接写出
的值.
在一次数学活动课上,老师带领学生对矩形纸片进行如下操作:
![](https://img.xkw.com/dksih/QBM/2023/9/2/3315876055195648/3325234313355264/STEM/cda2548ff8684c5db1c3248310a780da.png?resizew=550)
(1)探究一:
如图1,矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.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/055c583a7ddf04e766727cb9bb2fc09e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30c4df0ff2da41ce8431b13c9936832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7096fdcee49451970e84214dee5c2e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)探究二:
如图3,将纸片任意翻折,折痕
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30c4df0ff2da41ce8431b13c9936832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7096fdcee49451970e84214dee5c2e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)探究三:
如图4,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb4252bbeacacd8b21432c083a28021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30e51d3170d01d7c227b71902e25626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83847bf2e9122ea6a025efd87bd535f5.png)
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【推荐2】如图,四边形OABC为矩形,其中O为原点,A、C两点分别在x轴和y轴上,点B的坐标是(4,6),将矩形沿直线DE折叠,使点C落在AB边上点F处,折痕分别交OC、BC于点E、D,且点D的坐标是(
,6).
(1)求BF的长度;
(2)如图2,点P在第二象限,且△PDE≌△CED,求直线PE的解析式;
(3)若点M为直线DE上一动点,在x轴上是否存在点N,使以M、N、D、F为顶点的四边形是平行四边形?若存在,求出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(1)求BF的长度;
(2)如图2,点P在第二象限,且△PDE≌△CED,求直线PE的解析式;
(3)若点M为直线DE上一动点,在x轴上是否存在点N,使以M、N、D、F为顶点的四边形是平行四边形?若存在,求出点N的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/9e6613fd-337b-470f-ab99-d5301f1a1f29.png?resizew=420)
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【推荐1】(1)方法导引:
问题:如图1,等边三角形
的边长为6,点
是
和
的角平分线交点,
,绕点
任意旋转
,分别交
的两边于
,
两点.求四边形
面积.
讨论:
①小明:在
旋转过程中,当
经过点
时,
一定经过点
.
②小颖:小明的分析有道理,这样我们就可以利用“
”证出
.
③小飞:因为
,所以只要算出
的面积就得出了四边形
的面积.
老师:同学们的思路很清晰,也很正确.在分析和解决问题时,我们经常会借用特例作辅助线来解决一般问题:请你按照讨论的思路,直接写出四边形
的面积:________.
(2)应用方法:
①特例:如图2,
的顶点
在等边三角形
的边
上,
,
,边
于点
,
于点
,求
的面积.
②探究:如图3,已知
,顶点
在等边三角形
的边
上,
,
,记
的面积为
,
的面积为
,求
的值.
③应用:如图4,已知
,顶点
在等边三角形
的边
的延长线上,
,
,记
的面积为
,
的面积为
,请直接写出
与
的关系式.
问题:如图1,等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b398a23aff161c6f5d948f23abc95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d02330f6bad86f5bcdfd8141ca626.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a9ba7b666dae8aa7aaec80a6811c91.png)
讨论:
①小明:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d02330f6bad86f5bcdfd8141ca626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②小颖:小明的分析有道理,这样我们就可以利用“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ba04decd9d9204ec64d567af55721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27abbcf31488281eb13767cf2488c58e.png)
③小飞:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27abbcf31488281eb13767cf2488c58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a9ba7b666dae8aa7aaec80a6811c91.png)
老师:同学们的思路很清晰,也很正确.在分析和解决问题时,我们经常会借用特例作辅助线来解决一般问题:请你按照讨论的思路,直接写出四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a9ba7b666dae8aa7aaec80a6811c91.png)
(2)应用方法:
①特例:如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d02330f6bad86f5bcdfd8141ca626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3fd00798e7ec50afafe7fa7a4f42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17b89160163de99bfdc3f2676be5da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebef5bab02280cdc99cc7f689135cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4686f39b38d5b90309ee73ed89a0640.png)
②探究:如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d731948cc9749b61472445faaaae337c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3fd00798e7ec50afafe7fa7a4f42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4686f39b38d5b90309ee73ed89a0640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72a855bb6d80737099e412ed52a26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
③应用:如图4,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d731948cc9749b61472445faaaae337c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4686f39b38d5b90309ee73ed89a0640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72a855bb6d80737099e412ed52a26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/2020/4/14/2441137846771712/2441165931601920/STEM/262b42658ad24aa0ad5fc726fd0cc6bb.png?resizew=150)
![](https://img.xkw.com/dksih/QBM/2020/4/14/2441137846771712/2441165931601920/STEM/b96a351e492f4f28be4d9f00ef543541.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/2020/4/14/2441137846771712/2441165931601920/STEM/0160d191c6774edaad11b2b5c6389592.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2020/4/14/2441137846771712/2441165931601920/STEM/d6f2c46e1f324a39815e72e0abe8887f.png?resizew=181)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,
是矩形
的边
上一点,
,交
的延长线于点
交
于点
在矩形内部且为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/a8ed96b6-3647-493a-b123-f197ee8ed467.png?resizew=227)
(1)求证:
;
(2)若
,求
的长;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/bc3a3137299ffaea0545cd45323f1af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6077799f4c18937fd3bb7e14cf3d1e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4b833fb7dd03c34ac40c664cd8483d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7daeca1219535de017a3b4f518837419.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/a8ed96b6-3647-493a-b123-f197ee8ed467.png?resizew=227)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fddcf3b1b6aec6d34bef7dd55c0a6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a0ff152eceadaa19218ab1e66f01b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f2e06041e2d4345d3b53688441df37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b020e3977f31139a1153a1c1d23dc7.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在
中,
的面积为15,点
在边
上,
,连接
.点
从点
出发,沿折线
的方向运动,点
在
上的运动速度是每秒5个单位长度,在
上的运动速度是每秒
个单位长度.连接
,点
是点
关于直线
的对称点,连接
.设点
的运动时间为
.
(1)①点A到边
的距离为______.
②
______.
(2)当点
在
的外部时,求
的取值范围.
(3)当点
在同一条直线上时,求
的面积.
(4)当直线
将线段
分成
两部分时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f60f8ab60d7f61e37e58a27173e123d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40cd82bc2e506f6ec40e71003cd9ed81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f53398be639b8fc0ee974864a77986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecd76012d1b9c5e9fec6221e6e489c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/d40a69ba-fb50-47af-80d9-c163969e5b7c.png?resizew=201)
(1)①点A到边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712acf7155c7ea14180f40788a54af20.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e32e947597da0bbc66ca7f6c66cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbe7527b00b9a18320fc1f6e97398ac.png)
(4)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7ef20e925954f796cc9af744e4a38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,点
是半圆
的半径
上的动点,作
于
.点
是半圆上位于
左侧的点,连结
交线段
于
,且
.
![](https://img.xkw.com/dksih/QBM/2014/4/11/1573719002759168/1573719009280000/STEM/0d06ed715d5f4afba166d863cbef5d94.png)
(1) 求证:
是⊙O的切线.
(2) 若⊙O的半径为
,
,设
.
①求
关于
的函数关系式.
②当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73698d02cbfbe4d075b0958bcf030958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374e2198b495b86b0f8308d28035a3db.png)
![](https://img.xkw.com/dksih/QBM/2014/4/11/1573719002759168/1573719009280000/STEM/0d06ed715d5f4afba166d863cbef5d94.png)
(1) 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(2) 若⊙O的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47715e14e5203d7e9829b605301f35d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149c9c6b0961f0170f41b1b3d62c9244.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4f3ea707431e69ce7f67f20b09c5ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
您最近一年使用:0次