解题方法
1 . 如图,△ABC中,∠ACB=90°,AB=12,点D,E分别是边AB,BC的中点,CD与AE交于点O,则OD的长是( )
A.1.5 | B.1.8 | C.2 | D.2.4 |
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2020-06-14更新
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4卷引用:专题07 相似三角形模型(八大题型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(山东专用)
(已下线)专题07 相似三角形模型(八大题型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(山东专用)2020年安徽省合肥市包河区九年级数学一模试题安徽省合肥市包河区2019-2020学年九年级下学期教学质量检测(一)数学试题(已下线)易错模型02+相似模型1(十大易错分析+变式训练+易错题通关)-备战2024年中考数学考试易错题(全国通用)
2 . 如图,正方形
中,
,连接
交对角线
于点
,那么
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/93de4502-53c6-4d14-8bec-f3be08c466f4.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593581f0ed77ffe216f246e6827f9d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/75196fea67dfdb93c6d4ac675f2f44bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/93de4502-53c6-4d14-8bec-f3be08c466f4.png?resizew=136)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-05-08更新
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2卷引用:重庆市沙坪坝区2017-2018学年八年级下学期期末数学试题
3 . 如图,在
中,点
在
上,
与
相交于点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ce29f74ce7efd65609216a42df81e7.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2464ecc6b5255ad39bfd0297f57c9a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ce29f74ce7efd65609216a42df81e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/31/1004d7a8-4793-4975-9214-e840bba23242.png?resizew=163)
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2020-04-21更新
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141次组卷
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3卷引用:陕西省西安市新城区2023-2024学年九年级上学期期末数学试题
4 . 《九章算术》中记载:今有邑方不知大小,各开中门,出北门四十步有木,出西门八百一十步见木,问:邑方几何?译文:如图,一座正方形城池北、西边正中
,
处各开一道门,从点
往正北方向走40步刚好有一棵树位于点
处,若从点
往正西方向走810步到达点
处时正好看到此树,则正方形城池的边长为( )
![](https://img.xkw.com/dksih/QBM/2020/4/9/2437928309407744/2438400145702913/STEM/4d52a27f0db3488eb9cbf1d376274bb3.png?resizew=197)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2020/4/9/2437928309407744/2438400145702913/STEM/4d52a27f0db3488eb9cbf1d376274bb3.png?resizew=197)
A.360步 | B.270步 | C.180步 | D.90步 |
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10卷引用:吉林省长春市汽开区2019-2020学年九年级上学期期末数学试题
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5 . 如图,在△ABC中,点D在AB上,∠ACD=∠B,AB=5,AD=3,求AC的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/1dfdb1a1-be37-41e8-bef5-f847a576e667.png?resizew=230)
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2卷引用:辽宁省大连市中山区2018-2019学年九年级上学期期末数学试题
6 . 如图,
是
的边
上的任意一点,已知
,
,
,若
的面积为
,则
的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424307060105216/2424458688380928/STEM/50283bd0220041b7b0e2acb697b3a8ff.png?resizew=214)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1f8c020a6e3991537f7b634df041c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424307060105216/2424458688380928/STEM/50283bd0220041b7b0e2acb697b3a8ff.png?resizew=214)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 如图,
与
相交于点
,
∥
,
,则
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27a6cd0ce596c9d1948ebdba01e532c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421394881323008/2422312399495168/STEM/625983fddcbd4a4aacbc66f2d944f745.png?resizew=145)
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8 . 如图,在
中,
,
,
,
,
,求
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e210c9698063925ad2df6b6c1749571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262e062dcdd2039084a356862b123e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5e4efd5c0fbf5b572b00e04b185c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f7d9f5e71bfef8188b1216c1276c2d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421394544820224/2422287493046272/STEM/8b7d6013506f4f879a6034775090593c.png?resizew=144)
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9 . 如图,矩形ABCD中,BC=2,将矩形ABCD绕点D顺时针旋转90°,点A,B,C分别落在点A',B',C'处,且点A',C',B在同一条直线上,则AB的长为__________ .
![](https://img.xkw.com/dksih/QBM/2020/3/13/2418862191149056/2419316317487104/STEM/35fccb74c6a24d3e86ca77fa87e9c6e8.png?resizew=111)
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10 . 如图,点
分别在
的
,
边上,且
,
于点
,与
交于点
,已知,
,
,
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a078495ba47076ccaa28b46f765d80.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/f64c9335-3ed2-41ea-87a1-da8f33f00133.png?resizew=150)
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