如图①,在菱形
中,
,
是对角线,点
、
分别是
、
上两个动点(不与端点重合),且
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/5aced4e3-f0ef-4170-99d0-a965516c12bf.png?resizew=363)
(1)求证:
;
(2)如图②,连接
,若
于点
,求证:
;
(3)若
,试探究
与
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e444739e269a94733b2b0598b559313.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/5aced4e3-f0ef-4170-99d0-a965516c12bf.png?resizew=363)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72114fd51d535beecb5b27d9c925fd42.png)
(2)如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb25434985431dcc5c33fcbb3354b786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf436ee69b233d13ced54643f8ebc780.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f78d155d12cface8cfcf6f17125c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
2022·海南海口·二模 查看更多[4]
2022年海南省海口市第九中学初中毕业生学业水平模拟考试(二)数学试题(已下线)2022年海南省中考数学变式题17-22 广东省佛山市2021-2022学年九年级上学期期中数学模拟试卷(已下线)专题4.55 第二、四章测试题专练(专项练习)-2022-2023学年九年级数学上册基础知识专项讲练(北师大版)
更新时间:2022-06-11 15:50:50
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在菱形
中,对角线
与
相交于点O,
,点M是对角线
上的动点(不与点O,D重合),将线段
绕点M顺时针旋转
得到线段
.
上,点N在
边上时,连接
,求证:M是
中点;
(2)如图2,当点M在线段
上,点E在线段
的延长且满足
,连接
,
.
①依题意补全图形;
②求证:
.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eac7f2d95cb6147d8a6499a1923ac57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8dd0c52aca1675c17b9a019aa7901e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
(2)如图2,当点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79be9d9dfa2aa021f076e71ce80b8330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
①依题意补全图形;
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8df5c9bba54641ce3a58d71b47e7bbc.png)
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名校
【推荐2】如图,已知AB
CD,OA=OD,AE=DF. 试说明:EB
CF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/24e97187-ed73-4091-b79c-759978909d2b.jpg?resizew=141)
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解答题-证明题
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【推荐1】如图1,在等边
中,D,E分别是边
上点,且
,
与
相交于点P,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/e8a34dd3-5890-46d1-a0ca-8abd7741ed8e.png?resizew=264)
(1)求证:
;
(2)若
,求证:
;
(3)如图2,连接
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4686991a254f5d531d018691b213ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7852eb99a283b8f0bd5a4dff3c2def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/e8a34dd3-5890-46d1-a0ca-8abd7741ed8e.png?resizew=264)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4caec955364802e9bcac413c5ff43a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62d0e6f509dcec0ebcb0d34d212d3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f16d6d60a667eacd9a4c7d35ab6916.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaf2f89ba6b6b4133453ad43cfec86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a03f7ee97d3e9b4179c7c022acc0915.png)
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【推荐2】如图,
中,
,点
在
上,点
在
外部,且
,
,点
在
上,且
,连接
.
(1)求证:
.
(2)若
,且
,求
的长.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd44e7b89f25f7242e009653f268d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641c698e38a96ca4911b44191d6fe7f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515d145b2605006214af641b81f3546f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/28/ef21f8d2-006b-4979-b392-24bf53f96f76.png?resizew=231)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eaae19bdc11b3bb9c78cd0ea425f565.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfdc6e2bdde8bc6086c6d9415bc02bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad9ba9da6c5ae5f23eda257993d1c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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名校
【推荐3】图形变换中的数学问题情境:在课堂上,兴趣学习小组对一道数学问题进行了深入探究.如图①,在Rt△ABC中,∠ACB=90°,∠A=30°,点D是AB的中点,连接CD.
探索发现:
(1)图①中BC与BD的数量关系是 ,并说明理由.
猜想验证:
(2)如图②,若P是线段CB上一动点(点P不与点B,C重合),连接DP,将线段DP绕点D逆时针旋转60°得到线段DF,连接BF.请猜想BF,BP,BD三者之间的数量关系,并证明你的结论;
拓展延伸:
(3)若点P是线段CB延长线上一动点,按照(2)中的作法,在图③中补全图形,求BF,BP,BD三者之间的数量关系,并说明理由.
探索发现:
(1)图①中BC与BD的数量关系是 ,并说明理由.
猜想验证:
(2)如图②,若P是线段CB上一动点(点P不与点B,C重合),连接DP,将线段DP绕点D逆时针旋转60°得到线段DF,连接BF.请猜想BF,BP,BD三者之间的数量关系,并证明你的结论;
拓展延伸:
(3)若点P是线段CB延长线上一动点,按照(2)中的作法,在图③中补全图形,求BF,BP,BD三者之间的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2019/5/31/2215653643624448/2217824441049088/STEM/f191b84f650b438abab47c7470052c73.png?resizew=334)
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解答题-作图题
|
适中
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【推荐1】如图,网格中的每个小正方形的边长均为1,线段AB的端点均在小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2974152987443200/2982005196783616/STEM/d5ccdd16-0006-4947-8c90-6d588c6f1b2e.png?resizew=290)
(1)在图中画出以AB为一边的菱形ABCD,点C和点D在小正方形顶点上;
(2)在图中画出以AB为斜边的直角三角形ABE,点E在小正方形顶点上,且
,连接CE,请直接写出线段CE的长.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2974152987443200/2982005196783616/STEM/d5ccdd16-0006-4947-8c90-6d588c6f1b2e.png?resizew=290)
(1)在图中画出以AB为一边的菱形ABCD,点C和点D在小正方形顶点上;
(2)在图中画出以AB为斜边的直角三角形ABE,点E在小正方形顶点上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bc6e58e4d718922ece8c00fe7d8d77.png)
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【推荐2】如图,在
中,
,
,
,动点
从点
出发沿
方向以
的速度向点
匀速运动,同时动点
从点
出发沿
方向以
的速度向点
匀速运动,当其中一个点到达终点时,另一个点也随之停止运动.设点
,
运动的时间是
,过点
作
于点
,连接
.
为菱形,则
值为多少?
(2)在点
、
的运动过程中,设四边形
的面积为
,请求出
与
的函数关系式?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8575912bebb3106ad40918ad4c30bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00eb4d20975075d854f6f97d63be17ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0ae79a16f786bf2077ee37c564435f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171e02f78e30ca17469c7ec007dd8db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f051275aa34c90fd6957973f6640753.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073c802957bed52c2c72c3bf9395447e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a8a46105dd85172c00b4ac8405d842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8057131f4bae6260aaeda1eb3c77fb7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)在点
![](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/366d9cd1aaa1310b5497bd7a65eb65ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-证明题
|
适中
(0.65)
真题
【推荐1】如图,以AB为直径的半圆中,点O为圆心,点C在圆上,过点C作
,且
.连接AD,分别交
于点E,F,与
交于点G,若
.
;
②CD是
的切线.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151adae7bf60f109d3f275fd9fd4e5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d5515d5d25dc03af3e84abada231ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403f74eab33359ba256d0076a6d14f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0434c0177ca5c88ec129bd4cc13f4a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b965c6f0db054066a13e860a4c2489c.png)
②CD是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1d101528e88f28d3571a2c884954d8.png)
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解答题-证明题
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真题
【推荐2】在边长为
的正方形
中,点
在边
上(不与点
,
重合),射线
与射线
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/fccbfb21-b069-4fb1-ab03-3be388bda791.png?resizew=151)
(1)若
,求
的长.
(2)求证:
.
(3)以点
为圆心,
长为半径画弧,交线段
于点
.若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/fccbfb21-b069-4fb1-ab03-3be388bda791.png?resizew=151)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbfb9e31881061b8141603f719a71c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4e332b75fce3f9257a81dd5cc94587.png)
(3)以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650159560e11a252f791d5d940ff6f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
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