名校
1 . 如图,正六边形ABCDEF,连接AE,CF,则
=__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a12235fc709caecafb64248d2fb8001.png)
![](https://img.xkw.com/dksih/QBM/2020/6/9/2481000887681024/2481891137208321/STEM/e1d1960a05ae4ce3975ae94faaf49005.png?resizew=171)
您最近一年使用:0次
2020-06-10更新
|
85次组卷
|
2卷引用:湖北省武汉市第三寄宿学校2020-2021学年九年级上学期月考数学试题
2 . 已知:已知Rt△ABC中,∠ACB=90°,D、E分别是AC、BC上的点,连DE,且
,tanB
,如图1.
(1)如图2,将△CDE绕C点旋转,连AD、BE交于H,求证:AD⊥BE;
(2)如图3,当△CDE绕C点旋转过程中,当CH
时,求
AH﹣BH的值;
(3)若CD=1,当△CDE绕C点旋转过程中,直接写出AH的最大值是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86beed4bdadef3d00c245fcc18a1001e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8436da84f268c105c7c5860554f20e5.png)
(1)如图2,将△CDE绕C点旋转,连AD、BE交于H,求证:AD⊥BE;
(2)如图3,当△CDE绕C点旋转过程中,当CH
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd516e4b396722941982a389ee6e524c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)若CD=1,当△CDE绕C点旋转过程中,直接写出AH的最大值是 .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/db230e19-02db-453b-bc8c-e839c9d9e9e6.png?resizew=400)
您最近一年使用:0次
解题方法
3 . 在Rt△ABC中,∠ACB=90°,BE平分∠ABC,D是边AB上一点,以BD为直径的⊙O经过点E,且交BC于点F.
(1)求证:AC是⊙O的切线;
(2)若BF=6,⊙O的半径为5,求CE的长.
(1)求证:AC是⊙O的切线;
(2)若BF=6,⊙O的半径为5,求CE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/2c14e17f-405f-4c42-922c-fdd064326772.png?resizew=115)
您最近一年使用:0次
2020-05-20更新
|
1226次组卷
|
39卷引用:湖北省襄阳市樊城区2018届中考模拟试卷数学试题
湖北省襄阳市樊城区2018届中考模拟试卷数学试题2014届浙江杭州十五中教育集团九年级第二学期3月月考数学试卷天津市宁河区2018届九年级下学期第一次联考数学试题2018年浙江省衢州市中考数学一模试卷山东省聊城市高唐县第二实验中学2018届九年级学业考试模拟(一)数学试题【全国区级联考】山东省德州市宁津县2018届九年级下学期二模数学试题【全国区级联考】天津市宁河区2018届九年级下学期第一次联考数学试卷【校级联考】山东省聊城市冠县2018届中考一模试卷数学试题【校级联考】江苏省连云港市灌南县2018届九年级5月份中考模拟考试数学试卷【校级联考】江苏省南通市海安县2018届九年级中考模拟数学试题【区级联考】江苏省南京市秦淮区2019届九年级(上)期末数学模拟试题(一)【校级联考】江西省兴国县2019届九年级上册第四次月考数学试题浙教版九年级数学下册 第二章 直线与圆的位置关系【区级联考】天津市红桥区2019届九年级(上)期末数学模拟试题【区级联考】广东省阳江市阳东区2019届九年级(上)期末数学试题【市级联考】浙江省衢州市2019届九年级中考模拟数学试题【市级联考】浙江省衢州市2019届九年级中考数学一模试卷【市级联考】吉林省长春市2019届九年级下学期第一次摸底考试数学试题【校级联考】浙江省杭州市萧山区城厢片2019届九年级(下)期初数学试卷2019年贵州省黔西南州望谟六中九年级第四次月考数学试题(6月份)贵州省遵义市第十一中学2019-2020学年九年级上学期第二次月考数学试题广西壮族自治区贵港市港南区2019-2020学年九年级上学期期末数学试题2020年山东省济宁市曲阜师大附属梁山中学中考数学一模试题2020年山东省滨州市九年级4月中考模拟数学试题2020年山东省临沂市郯城县九年级学业水平考试一模数学试题2020年山东省莘县九年级中考数学一模试题贵州省铜仁市万山区2020年初中毕业班模拟考试(一)数学试题(已下线)专题3.29 《圆》中的切线证明专题(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(北师大版)2021年山东省临沂市罗庄区五月份中考数学模拟试题(b卷)江苏省南通市港闸区陈桥中学2021-2022学年九年级下学期第一次段考数学试题(一模)(已下线)第03课时 点与圆、直线与圆的位置关系(1)-2022-2023学年九年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)河南省信阳市光山县2022-2023学年九年级上学期期中数学试题(已下线)专题2.41 几何模型专题(切线的证明)(分类练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题02 对称图形-圆(知识串讲+热考题型+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(苏科版)山东省济宁市济宁孔子学校2023-2024学年九年级上学期期中数学试题(已下线)专题24.47 几何模型专题(切线的证明)(分类练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题06 直线与圆的位置关系(知识串讲+热考题型+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)浙江省台州市黄岩区2022-2023学年九年级上学期期末数学试题江西省九江市都昌县2023-2024学年九年级下学期期中数学试题
解题方法
4 . 矩形
的对角线交于点
,
.
(1)如图1,
,
,点
在边
上,点
在边
上,求证:
;
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466151793680384/2466703512657920/STEM/dd3b55ffef9c47ac948bb03fb8a9927d.png?resizew=134)
(2)如图2,
,
,点
在线段
的延长线上,点
在线段
的延长线上,若
,求
的值;
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466151793680384/2466703512657920/STEM/5c6277e55519445b9127d48214a6599e.png?resizew=186)
(3)如图3,
,
,
,点
在线段
的延长线上,点
在线段
的延长线上,若
,直接写出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84261efd0ff6fafdc55cd446c1a5f68.png)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15416b74b2ecbcfa38cf34a9ffff730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5f78138d03698683ca5caffaf97132.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466151793680384/2466703512657920/STEM/dd3b55ffef9c47ac948bb03fb8a9927d.png?resizew=134)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5c45a72849d2cae1d65b282b5bd19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2032fccdf9ab12429aae024d67b19d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c64999e4e5a8d032dcb1d2de1a5dc9f.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466151793680384/2466703512657920/STEM/5c6277e55519445b9127d48214a6599e.png?resizew=186)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead1eda1ca5b67586379a09a4c3540b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c69a23d106fd34aa17b22e9c9a8de36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e395831eddeca6f5ae769b2dfa2b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466151793680384/2466703512657920/STEM/3d2fe3cef858438f9fae1cf9c5eca260.png?resizew=153)
您最近一年使用:0次
解题方法
5 . △ABC中,AD⊥BC,E,F分别在AB,AC上.
(1)已知:DE⊥DF
①如图1:若AB⊥AC,求证:△DAE~△DFC.
②连EF,若FE⊥AB于E(如图2),且BD:CD:DA=2:3:4,EF=4
,求BC的长.
(2)连EC,DE平分∠BEC(如图3),且AD=2CD,CE=2AE,若DE=10,求AC的长.
(1)已知:DE⊥DF
①如图1:若AB⊥AC,求证:△DAE~△DFC.
②连EF,若FE⊥AB于E(如图2),且BD:CD:DA=2:3:4,EF=4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30efdb9c7eb4b788352056f3edf21635.png)
(2)连EC,DE平分∠BEC(如图3),且AD=2CD,CE=2AE,若DE=10,求AC的长.
![](https://img.xkw.com/dksih/QBM/2020/5/16/2463747705479168/2463854069030912/STEM/078fdcd2c8494c808cc1045ae24fe100.png?resizew=450)
您最近一年使用:0次
解题方法
6 . 如图,
中,
,
是
上一点,且
,
是
上任一点,
于点
,
于点
,下列结论:①
是等腰三角形;②
;③
;④
,其中正确的结论是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.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/fb7a1d7dead053c838decaf271354b6f.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/5d31767eb718a0327eca546fe6a189cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba05eed0b25ee0ee6b0e7fcd09fda1ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8d351634b8c957afeeaa7a528dfab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d3c2db2960ad3f824f4acc1658146d.png)
A.①② | B.①③④ | C.①④ | D.①②③④ |
您最近一年使用:0次
2020-05-15更新
|
242次组卷
|
2卷引用:河南省安阳市2017-2018学年八年级下学期期末数学试题
7 . 如图,
的面积为
AD=4.点
从点
出发,以每秒
个单位的速度向点
运动:点
从点
同时出发,以每秒
个单位的速度向点
运动.规定其中一个点到达端点时,另一个点也随之停止运动。
(1)求线段
的长;
(2)设点
运动的时间为
秒,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a4a9d287535c352e06ecdc6b562de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd70af76b2ff6a1f36e1a29d9c2a57b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
8 . 如图,将矩形
沿对角线
折叠,点
落到点
处,
交
于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8182e8ed3ee96372ee39a77faea9b0d3.png)
(2)若
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9806df6df27bf715c81c4a93fc6517c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8182e8ed3ee96372ee39a77faea9b0d3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3f532877da18af4ceff95e5c76d8ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2465ee1fec12351943f15055dfd6ec73.png)
![](https://img.xkw.com/dksih/QBM/2020/5/9/2459250330927104/2460350130118656/STEM/f3b5e32408954bef92de4a238edbf476.png?resizew=163)
您最近一年使用:0次
9 . 如图,△ABC中,AB=5,AC=3,BC=4,D是BC边上一动点,BE⊥AD,交其延长线于E,EF⊥AC,交其延长线于F,则AF的最大值为_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/888b86b5-b6eb-41d4-a142-2b00cf3bcc8d.png?resizew=113)
您最近一年使用:0次
10 . 如图,
,
平分
,
平分
,
,
相交于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/39126293-ae49-47ad-af57-c42dea023e94.png?resizew=189)
(1)求证:四边形
是菱形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cebb0f4c0bcc418701bd0ebcc96c673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1912c4e0fe478ba402a887fdc759d3f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/39126293-ae49-47ad-af57-c42dea023e94.png?resizew=189)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c85409e4c685f7dbadae2de3cf9a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
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