1 . 如图,在
中,
,
,
,O是
的中点,D是线段
上一点,以O为旋转中心,将线段
顺时针旋转
,得到扇形
.______
上(填“在”或“不在”);
②求A,E两点间的距离.
(2)如图2,设
交
于点
,
交
于点G,若
于点O,求阴影部分的面积;
所在圆与
的边相切时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee608882881caff2f1e223177424ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
②求A,E两点间的距离.
(2)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.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/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebef5bab02280cdc99cc7f689135cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
您最近一年使用:0次
2 . 在四边形
中,
,
,
,
,
,
于点H.在
中,
,
,
.将
按如图1放置,顶点E在
上,且
,然后将
沿
平移至点E与点A重合,再改变
的位置,如图3,将顶点E沿
移动至点B,并使点H始终在
上.
(1)当点E在
上运动时,
如图1,连接
,当
时,求
的长;
如图2,设
与
的交点为M,当顶点G落在
上时,求
的长;
(2)如图3,点E在
上运动时,
交
于点P,设
,请用d表示
的长,并求出
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fb1fcaf49d18befa6ea9437d7bd472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d48852ad433b0da21abf5be0f79260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcb573bddf8503ccdb402d8772c7b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b63537336fea79312cbfb82831320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/716cb96b-3ab8-4a11-9eed-866b882f361d.png?resizew=387)
(1)当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d80f4864d66bf03827059bffdc224c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
(2)如图3,点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c351cb19da2db20bcf116fff7e936621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
您最近一年使用:0次
2023-05-25更新
|
423次组卷
|
4卷引用:2023年河北省保定市张家口市承德市中考二模数学试题
3 . 如图,在平面直角坐标系
中,二次函数
的图象经过点
,
,与
轴交于点
,连接
.
(2)设二次函数的图象的顶点为
,求直线
的函数表达式以及
的值;
(3)若点
在线段
上(不与
重合),点
在线段
上(不与
重合),是否存在
与
相似,若存在,请直接写出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b8c639c851e0044ee22020324c5570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7480deb6fedddf1fb05d8cdb24be1703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887721a843b2dc8e947cc42d09868e33.png)
(2)设二次函数的图象的顶点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4fe85ca088b8de0784f105f3cbec6f.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
2023-05-18更新
|
449次组卷
|
7卷引用:2023年河北省衡水市部分学校中考模拟数学试卷
2023年河北省衡水市部分学校中考模拟数学试卷2023年江苏省无锡市宜兴市中考一模数学试题(已下线)专题05 二次函数-学易金卷:2023年中考数学一模试题分项汇编(江苏专用)2023年山东省东营市利津县中考二模数学试题2023年江苏省无锡市滨湖区江南大学附属实验中学中考数学二模模拟试题2024年江苏省无锡市滨湖区九年级数学中考模拟预测题2024年山东省菏泽市鄄城县九年级中考三模数学试题
2023·河北·模拟预测
4 . 如图1是某工厂生产的某种多功能儿童车,根据需要可变形为滑板车或三轮车,图2、图3是其示意图,已知前后车轮半径相同,车杆
的长为
,点
是
的中点,前支撑板
,后支撑板
,车杆
与
所成的
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/28ac1384-a0e3-4e79-923c-0527043139f2.png?resizew=527)
(1)如图2,当支撑点
在水平线
上时,则支撑点E与前轮轴心
之间的距离
的长为______;
(2)如图3,当座板
与地面保持平行时,求变形前后两轴心
的变化量(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9871f2a312aaf3a19b40e4fb1a7693b.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/0929e4e5151c8f27a5486fc94bff9cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab50cb1ec4b578e948e5eaa2fdcbed41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f039e45e5feea00e957b49af46c68a0f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/28ac1384-a0e3-4e79-923c-0527043139f2.png?resizew=527)
(1)如图2,当支撑点
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图3,当座板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fe9cc87f8e8389c94efa7e7caab2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad548d3bb499aab6d0baf4032be99bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7664a5f9b61fd010eda340986ca34b47.png)
您最近一年使用:0次
5 . 如图所示,已知在平面直角坐标系
中,点
,点M是横轴正半轴上的一个动点,
经过原点O,且与
相切于点M.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/b5c63519-a636-4178-ae60-07f86c585475.png?resizew=148)
(1)当
轴时,点P的坐标为_____________ ;
(2)设点P的坐标为
,则y关于x的函数关系式为 _____________ (不用写出自变量x的取值范围);
(3)当射线
与直线
相交时,点M的横坐标t的取值范围是_____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc32b51af34f65636be5b0dc4810740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/b5c63519-a636-4178-ae60-07f86c585475.png?resizew=148)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd263fa65347735f95d3364e5b91a58.png)
(2)设点P的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
(3)当射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
6 . 如图,轮船在A处观测灯塔C位于北偏西
方向上,轮船从A处以每小时40海里的速度沿南偏西
方向匀速航行,1小时后到达码头B处,此时,观测灯塔C位于北偏西
方向上,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/78ccf85c-5ec6-4825-9029-f9fc9780cf8b.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aa0b9869db50a9ab48cc32925d8e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb94bd9eb80fb9f5f02f518bb8f2211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31a14bd2a972f43d7a26a99589ad083.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/78ccf85c-5ec6-4825-9029-f9fc9780cf8b.png?resizew=186)
A.![]() | B.点B到![]() ![]() |
C.![]() | D.点B在点C的南偏东![]() |
您最近一年使用:0次
7 . 如图1,在
中,
,点A,D是射线
上的点,以
为一边在
内作矩形
,点C在
边上.
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996205259366400/2996267067875328/STEM/15cdd5d5-5102-493a-a6ef-94833bd1e1ec.png?resizew=203)
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996205259366400/2996267067875328/STEM/8a130cf5-2906-4189-9813-c8dcbd96b21f.png?resizew=205)
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996205259366400/2996267067875328/STEM/e722e867-ff7b-4324-9aad-b660b900e778.png?resizew=211)
(1)当点B在
边上时,求
的长;
(2)如图2,若A,B,O三点共线,且
是以
为腰的等腰三角形,
①
__________;
②求
的长;
(3)在图2的基础上,点A向右移动得到图3连接
,若
和
相似,直接写出
的长.(注:三角形全等可视为三角形相似的特殊情况)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcc5eda9dd5eed6f286403ea90eeabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e593020a4861ecce487615f479bc2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcc5eda9dd5eed6f286403ea90eeabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1bf5e95676f8a50cfa0e94fab3273f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996205259366400/2996267067875328/STEM/15cdd5d5-5102-493a-a6ef-94833bd1e1ec.png?resizew=203)
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996205259366400/2996267067875328/STEM/8a130cf5-2906-4189-9813-c8dcbd96b21f.png?resizew=205)
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996205259366400/2996267067875328/STEM/e722e867-ff7b-4324-9aad-b660b900e778.png?resizew=211)
(1)当点B在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(2)如图2,若A,B,O三点共线,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b78320944be39e9ccd29879dd2be83.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(3)在图2的基础上,点A向右移动得到图3连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d6f2327f2fb63777d199e0d75f9539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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8 . 在半径为10的扇形AOB中,
,延长OB到点C,使
.点D为
上的动点,点E是扇形所在平面内的点,连接OD,DE,EC,当
时,解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/4/23/2967811236364288/2979434607362048/STEM/fbaf67bb41f84677bd08bfcf471e9d99.png?resizew=492)
(1)论证:如图1,连接OE,DC,当
时,求证:
;
(2)发现:当
时,∠ODE的度数可能是多少?
(3)尝试:如图2,当点D,E,C三点共线时,求点D到OA所在直线的距离;
(4)拓展:当点E在OC的下方,且DE与
相切时,直接写出∠DOC的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eefff339d7241da2d080bd8ffb56659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569f49ea6715d749b34ba4cd1ad431bc.png)
![](https://img.xkw.com/dksih/QBM/2022/4/23/2967811236364288/2979434607362048/STEM/fbaf67bb41f84677bd08bfcf471e9d99.png?resizew=492)
(1)论证:如图1,连接OE,DC,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3d35658918cadba18a1bf2022c211e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316cf9274aa01d320435b6ab4ea40c7b.png)
(2)发现:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c796ea4e05f63ad42352dd579c61b702.png)
(3)尝试:如图2,当点D,E,C三点共线时,求点D到OA所在直线的距离;
(4)拓展:当点E在OC的下方,且DE与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
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9 . 在∠MON的两边OM,ON上分别取点H,I,作弧HI(可以是优弧,也可以是劣弧).若弧HI上所有点都在∠MON内部或边上,称点H、I是∠MON的内嵌点,弧HI所在圆的半径为∠MON的“角半径”,记为
.例如,下图1、图2、图3中的H、I都是∠MON的内嵌点.已知∠MON=60°,H、I是∠MON的内嵌点时,
的最小值是_________________;
(2)当OH=2,弧HI是半圆时,求线段OI长度的取值范围;
(3)当OH≤OI,
=3,
时,求线段OI长度的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753e7d0e714285ebaf26f919b937ae24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753e7d0e714285ebaf26f919b937ae24.png)
(2)当OH=2,弧HI是半圆时,求线段OI长度的取值范围;
(3)当OH≤OI,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753e7d0e714285ebaf26f919b937ae24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda68df02cf4229d85afc8d976fb70a8.png)
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2021-12-13更新
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230次组卷
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2卷引用:2024年河北省唐山市丰南区中考模拟数学试题
真题
名校
10 . 如图,
的半径为6,将该圆周12等分后得到表盘模型,其中整钟点为
(
为1~12的整数),过点
作
的切线交
延长线于点
.
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748574003732480/2748701406068736/STEM/5d475a66-966e-4360-8e99-6f0b38795aba.png?resizew=427)
(1)通过计算比较直径和劣弧
长度哪个更长;
(2)连接
,则
和
有什么特殊位置关系?请简要说明理由;
(3)求切线长
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b832048aa929fbb3542f1ccfccb6fe19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc133b72a0880684e8397ef7ae86f8aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748574003732480/2748701406068736/STEM/5d475a66-966e-4360-8e99-6f0b38795aba.png?resizew=427)
(1)通过计算比较直径和劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13229771074f7856ccd85500321c84d8.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebe38c27418923740444da823e04170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebe38c27418923740444da823e04170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800c5e266b4ad8462a46970f0a232d52.png)
(3)求切线长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ec50c57212cec0c33e2c0cb9262618.png)
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2021-06-22更新
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2716次组卷
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7卷引用:2022年河北省承德市承德县中考二模数学试题
2022年河北省承德市承德县中考二模数学试题河北省2021年中考数学试题河北省唐山市古冶区2021-2022学年九年级上学期期中数学试题2022年浙江省绍兴市新昌县实验中学初中毕业生学业水平监测模拟数学试题(已下线)专题06 圆-5年(2018-2022)中考1年模拟数学真题分项汇编(河北专用)(已下线)河北中考数学历年真题圆的综合题江苏省盐城市东台市第五联盟2021-2022学年九年级上学期期中数学试题