已知:如图,在正方形
中,
、
分别是
、
的中点.
与
有何关系.说明理由;
(2)延长
、
交于点H,则B、D、G、H这四个点是否在同一个圆上.说明理由.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
23-24九年级·江苏·假期作业 查看更多[5]
(已下线)重难点02“四点共圆”模型-【暑假自学课】2023年新九年级数学暑假精品课(苏科版)(已下线)2023年上海市中考数学真题变式题20-25题(已下线)专题07圆(7个知识点3种题型1个易错点2种中考考法)-【帮课堂】2023-2024学年九年级数学上册同步学与练(苏科版)(已下线)24.4(培优课)辅助圆、隐圆(题型精讲精练)-【题型分类精粹】2023-2024学年九年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)(已下线)专题13确定圆的条件、直线和圆的位置关系 (5个知识点8种题型)-【帮课堂】2023-2024学年九年级数学下册同步学与练(北师大版)
更新时间:2023-06-23 15:28:23
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相似题推荐
解答题-证明题
|
适中
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名校
【推荐1】在
中,点E,点F分别是边
上的点,且
,连接
交于点D,
.
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755712710533120/2755792000688128/STEM/af3df91059ae4e328b44f7d32615c81c.png?resizew=158)
(1)求证:
是等腰三角形;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5881068127a39caf319492b4177204f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925b8db9b6ed790adf04a5dff4e0e61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba9cf66066aafbafb6116928eeb10ad.png)
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755712710533120/2755792000688128/STEM/af3df91059ae4e328b44f7d32615c81c.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5516ea17b308a5c259a97805f440fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
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解答题-作图题
|
适中
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【推荐2】如图是由小正方形组成的
的同格,已知
的顶点B,C均在格点上,顶点A在小正方形的边上(不在格点上),仅用无刻度的直尺在给定同格中完成面图,画图过程用虚线表示.
(1)在图1中画出线段
的中点E,画出平行四边形
;
(2)在图2中过点A作一条直线
交线段
边于点P,使
与
面积比为
;
(3)在图3中作
的边
上的高
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4061b4f078613a24d3b485c260f1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/9a6c1033-8020-4c8f-828b-6520bdd066c8.jpg?resizew=459)
(1)在图1中画出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
(2)在图2中过点A作一条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60fe5130254a1d38bb4fd0015630f6d.png)
(3)在图3中作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-问答题
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适中
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【推荐1】已知,△ABC中,AC=BC,∠ACB=90°,CD为边AB上的中线,若E是线段CA上任意一点,DF⊥DE,交直线BC于F点.G为EF的中点,连接CG并延长交直线AB于点H.
(1)试说明:①AE=CF; ②CG=GD;
(2)若AE=6,CH=10,求边AC的长.
(1)试说明:①AE=CF; ②CG=GD;
(2)若AE=6,CH=10,求边AC的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/a75c5ace-3ae7-48a6-85d0-5f6326934dcc.png?resizew=242)
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解答题-证明题
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【推荐2】如图,在△ABC中,∠C=2∠B,点D为BC上一点,且AD⊥AB,点E是BD的中点,连接AE,且AE=DE.
(1)求证:∠AEC=∠C;
(2)若AE=8.5,AD=8,求△ABE的周长.
(1)求证:∠AEC=∠C;
(2)若AE=8.5,AD=8,求△ABE的周长.
![](https://img.xkw.com/dksih/QBM/2019/8/9/2265301245640704/2266698108411904/STEM/b973b5302be8455d86d2fbcc6ad403f5.png?resizew=215)
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解答题-证明题
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【推荐1】如图①,四边形ABCD是正方形,点E是BC上一点,连接AE,以AE为一边作正方形AEFG,连接DG.
![](https://img.xkw.com/dksih/QBM/2022/8/4/3037223652728832/3038923513970688/STEM/627ba266ef184125bf8189b10f33432c.png?resizew=338)
(1)求证:
;
(2)如图②,连接AF交CD于点H,连接EH,请探究EH、BE、DH三条线段之间的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2022/8/4/3037223652728832/3038923513970688/STEM/627ba266ef184125bf8189b10f33432c.png?resizew=338)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc180eda08edfb6d54eb04da7741f099.png)
(2)如图②,连接AF交CD于点H,连接EH,请探究EH、BE、DH三条线段之间的数量关系,并说明理由.
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解答题-证明题
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名校
【推荐2】感知:如图①,已知正方形
的边
在正方形
的边
上,连结
,易证
.(不需要证明)
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674171679580160/2676971169841152/STEM/872694f5-9663-47f9-8ee0-8ad7544b8bc3.png?resizew=201)
探究:将图①中正方形
绕点
按顺时针方向旋转,使点
落在
边上,如图②.连结
,证明:
.
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674171679580160/2676971169841152/STEM/8984408d-a6db-4c80-8774-b12625daa19b.png?resizew=158)
应用:如图③,正方形
中,
,点
在
的延长线上,
,
,
.直接写出点
与点
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc540afb1ebba0d47f5a8b164fabd81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8466ca1f90f1a3eda7b09793ea55b47a.png)
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674171679580160/2676971169841152/STEM/872694f5-9663-47f9-8ee0-8ad7544b8bc3.png?resizew=201)
探究:将图①中正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc540afb1ebba0d47f5a8b164fabd81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75b2c5479c279abca2faed278901.png)
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674171679580160/2676971169841152/STEM/8984408d-a6db-4c80-8774-b12625daa19b.png?resizew=158)
应用:如图③,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91f064bb73019053992fe781a53356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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解答题-问答题
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【推荐1】如图,DE为
的直径,A为ED的延长线上点,过点A的一条直线交
于B,C两点,已知
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6e7b3d0946d17b418482aaf38c87fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70f543b3f5b71e1b48dd1ba28d28839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828317732888576/2829054135934976/STEM/b09ce596-a786-4126-8021-a17bbf78f31c.png)
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解答题-证明题
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真题
【推荐2】如图,在
中,
,以点
为圆心,
为半径,作
,交
于点
,交
的延长线于点
,过点
作
的平行线
交
于点
,连接
,
,
.
(1)求证:
;
(2)当
等于多少度时,四边形
为菱形?请给予证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/adc2d1b8-5f48-46de-a564-138826b6adfc.png?resizew=139)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c39368b496c037874a708b4a7585e3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
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