1 . 如图1是一溜娃神器推车,溜娃时该推车底部支架张开后,其框架投影图如图2所示,两支撑轮是分别以点
,
为圆心,1.5分米长为半径的圆且与水平地面相切,其支架长
,竖直支撑柱
分米,水平座椅
分米,并与靠背
成
夹角,推手柄
分米.当张开角
时,
,
,
三点共线,且
,则
的长度为__________ 分米;如图3,当张开角
时,折叠支撑柱以上座椅部分绕着点
逆时针旋转使
点与圆心
重合,此时手柄
绕着点
顺时针旋转
至
处,则
到地面的距离是____________ 分米.
图1
图2
图3
![](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/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2222110ac5213ade4f5aae5436e475a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51faf5e3ee3aa6fa0831884abbd5f6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8298dc11a937d0a6c2304f8508215c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea30b3a5f150793257ee373c4beafbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1595961d21adc2139887668fe92d2b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b763b6f4f86b652af33e33eeb6d91796.png)
图1
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291937361920/2492949732081664/STEM/8b76cee4d27d49c4bb0e9ea91766efd6.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291937361920/2492949732081664/STEM/f7844e0f593e41058e2b28526c5a4b50.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291937361920/2492949732081664/STEM/c72f32b5b896464e94e0e36a2a2b0532.png?resizew=196)
您最近一年使用:0次
2 . 如图,等腰直角三角形
,沿
剪去
,取
中点
,沿
剪去
,作
,沿
剪去
记
,五边形
的面积为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e028be973d0fce777ff243ce72622faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da803a5e8ef81b68ddead39edf49e6a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265b4a690ccd9f9a4fde375828a6ff6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99124df0dfdeabd56bd79228b668b403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c4750875c2116879747e9d35178db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3780ad386dcc121df985401438a823a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66d69a422dd611c5fb3b18d4ccc835a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bb0bb1d59a0e0cf4e47c2036200afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcc5c5319f197967a6bc2ae4d49eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a781e6102c54f053b021d09bbe09771c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3dabace330ccdd9755fbcf32d5d6343.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/28/fa7c92a1-6576-4952-8936-8f75cbbb22cf.png?resizew=162)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图,拦水坝的横断面为梯形
,
,坝高
,斜坡
的坡度为
,斜坡
的坡角
,求坝底
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6d8f44470d9354404972f480226615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbcaacedd937365c76c4acceeac4fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db20862b954cd1886f4765657a46d91c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c69a23d106fd34aa17b22e9c9a8de36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/839053e3-bdca-457f-80d3-957090300c50.png?resizew=167)
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名校
4 . 如图,已知正方形ABCD的边长为4,E,F分别为AB,CD边上的点,且EF∥BC,G为EF上一点,且GF=1,M,N分别为GD,EC的中点,则MN=_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/c24667ca-3ebc-4e44-9287-53e4c3182dc1.png?resizew=153)
您最近一年使用:0次
2020-05-25更新
|
558次组卷
|
6卷引用:2020年浙江省慈溪市九年级学业水平模拟考试数学试题
2020年浙江省慈溪市九年级学业水平模拟考试数学试题(已下线)专题51 与四边形有关的填空题综合(九年级上重点突破)北师大版(已下线)考点17 矩形、菱形、正方形(考点专练)-备战2021年中考数学考点微专题(已下线)考点19 图形的相似(考点专练)-备战2021年中考数学考点微专题(已下线)浙江省温州市部分学校2022-2023学年九年级上学期数学期末试题变式题16-20河南省郑州市金水区实验中学2023-2024学年九年级上学期期末数学试题
5 . 如图,矩形
中,
分别为
的中点,且
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/e3fb9bfe-8acc-4ef3-a7cc-18e32a0a127d.png?resizew=129)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b62b997ff70441a93e187bb04b51be5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c051b0c20c3dfc23ee93c1810cfa237a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/e3fb9bfe-8acc-4ef3-a7cc-18e32a0a127d.png?resizew=129)
A.![]() | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
2020-05-14更新
|
76次组卷
|
2卷引用:2019年黑龙江佳木斯市升学大考卷(三)数学试题
6 . “综合与实践”是以问题为中心,以活动为平台,以解决某一实际的数学问题为目标,综合应用知识和方法解决问题,它是对数学知识的延伸和发展,是对理解、运用数学基础知识和基本技能的升华过程.请同学们运用你所学的数学知识来研究和解决以下问题吧.
(1)探究:已知
是平面上一个运动的点,若
,
,则当点
位于 时,线段
的长最小,最小值为 ;若
,
,则当点
位于 时,线段
的长最小,最小值为 ;
(2)应用:已知
是一运动的点,
,
,如图①所示,分别以
为边作等腰直角三角形
和等腰直角三角形
,且
,连接
和
.
①在图中找出与
相等的线段,并说明理由;
②何时线段
可以取得最小值?请直接写出线段
的最小值;
(3)拓展:如图②,在矩形
中,
,
,
为矩形
对角线的交点,
为
边上任意一点,连接
并延长与
边交于点
,现将图中
与
分别沿
与
翻折,使点
与点
分别落在矩形
内的点
,
处,连接
,则
的长有最小值吗?若有,请直接写出
的长的最小值;若没有,请说明理由.
(1)探究:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3015db5ca1f49bb7bad43657e06863ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)应用:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51253b21bafa0cf5a374242e65be6864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①在图中找出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
②何时线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)拓展:如图②,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8414369aceaa4231d66c698380926b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://img.xkw.com/dksih/QBM/2020/5/9/2458882623610880/2459770084130816/STEM/654207dd2a61453a9e8b6adf57ccbd0f.png?resizew=486)
您最近一年使用:0次
7 . 如图1,在矩形纸片
中,
,
,折叠纸片使
点落在边
上的
处,拆痕为
.过点
作
交
于
,连接
.
(1)求证:四边形
为菱形;
(2)当点
在
边上移动时,折痕的端点
、
也随之移动;
①当点
与点
重合时(如图2),求菱形
的边长;
②若限定
、
分别在边
、
上移动,求
的内切圆半径的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d92d5d2adfe12d5edd03e038c0b4e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd6ba8ca29e0f3402904f0cc956d494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8df9fecaa0b266568ad35fb8f0e019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/25/ce06048e-ad39-4a71-b04d-e91490581bdd.png?resizew=337)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbccc1ac03617b906661fc8b2016a6d4.png)
(2)当点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbccc1ac03617b906661fc8b2016a6d4.png)
②若限定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c0088f87b066e8cc8a96c13a81806.png)
您最近一年使用:0次
2020-05-10更新
|
249次组卷
|
2卷引用:2019年云南省昆明市十县区九年级初中学业水平模拟(一)数学试题
8 . 如图
是矩形
的对角线
分别是
上的动点,
则
的最小值为____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647db503c96fa101b1ca412d905efba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366ee83657af6cee9c8e6c4e5dd95399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5927083fbd926be2db861a7c38753d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fad3d2be13f11a8003f1547a24e8197.png)
![](https://img.xkw.com/dksih/QBM/2020/4/28/2451081549930496/2453568396771328/STEM/43732d3b68a44227accf4168a905b833.png?resizew=220)
您最近一年使用:0次
2019·河北·一模
9 . 如图,在矩形
中,
,
,P是矩形
内一点,沿
、
、
、
把这个矩形剪开,然后把两个阴影三角形拼成一个四边形,则这个四边形的面积为_________ ;这个四边形周长的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/df15af07-2ba8-4d5d-8d60-a28da324bb85.jpg?resizew=279)
您最近一年使用:0次
2020-02-07更新
|
958次组卷
|
6卷引用:2020年河北省沧州市青县九年级初中毕业考试数学试题
2020年河北省沧州市青县九年级初中毕业考试数学试题(已下线)【万唯】河北省2018-2019年初中学业水平数学模拟考题 《逆袭卷》专题(已下线)【万唯原创】2019年河北省中考数学逆袭卷-逆袭诊断卷(已下线)【万唯原创】2020年河北中考数学-预测卷-卷子32020年河北省邯郸市凌云中学九年级一模数学试题(已下线)广东卷02-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(广东专用)
10 . 如图,在
中,
,以AB为直径的⊙O交BC于点D,过点D作⊙O的切线交AC于点E,连接OD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/72a048df-418b-4f87-b723-fdb3b8e9615c.png?resizew=145)
(1)求证:
;
(2)若
,求DE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d2649a844e8619de4663a03c233f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/72a048df-418b-4f87-b723-fdb3b8e9615c.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87844845c8dd4f13b076dc57d95b80a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7d2df86ee897fffd62a719d889d791.png)
您最近一年使用:0次
2020-01-01更新
|
159次组卷
|
3卷引用:2020年广西河池市环江县九年级学业水平考试一模数学试题
2020年广西河池市环江县九年级学业水平考试一模数学试题安徽省阜阳市颍州区2019-2020学年九年级第一次质量检测数学试题(已下线)【万唯原创】2021年陕西省面对面-练习册-第一部分第六单元33+34