如图,已知BC⊥AC,圆心O在AC上,点M与点C分别是AC与⊙O的交点,点D是MB与⊙O的交点,点P是AD延长线与BC的交点,且
.
(1)求证:PD是⊙O的切线;
(2)若AD=12,AM=MC,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c12a1f843e507eccfe053f241d4eee0.png)
(1)求证:PD是⊙O的切线;
(2)若AD=12,AM=MC,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d853efb9d2aea48a2840391263ea8fba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/a10781b1-c4e7-47a1-bb4e-070847445677.png?resizew=141)
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内蒙古呼和浩特市2018年中考数学试卷人教版九年级下检测卷 第二十七章 综合能力检测卷2019年山东省五莲县第二中学中考数学二模试题(已下线)【万唯原创】点、直线与圆的位置关系·基础必练 (二)辽宁省铁岭市第四中学2023-2024学年九年级上学期期末考试数学试题
更新时间:2018-07-26 17:03:09
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【推荐1】如图,已知AB是⊙O的直径,C是⊙O上一点,∠BAC的平分线交⊙O于点D,交⊙O的切线BE于点E,过点D作DF⊥AC,交AC的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2015/11/4/1573923873447936/1573923879059456/STEM/6b0e3f36315a4b53a39f06203dd99d46.png)
(1)求证:DF是⊙O的切线;
(2)若DF=3,DE=2
①求
值;
②求图中阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/2015/11/4/1573923873447936/1573923879059456/STEM/6b0e3f36315a4b53a39f06203dd99d46.png)
(1)求证:DF是⊙O的切线;
(2)若DF=3,DE=2
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f4907f159ff9c4caacf266db591588.png)
②求图中阴影部分的面积.
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【推荐2】如图①,AB为⊙O的直径,AD与⊙O相切于点A,DE与⊙O相切于点E,点C为DE延长线上一点,且CE=CB.
![](https://img.xkw.com/dksih/QBM/2018/1/31/1872110397571072/1876737513889792/STEM/c465e877ba72484c809364db23ccc585.png?resizew=388)
(1)求证:BC为⊙O的切线;
(2)连接AE并延长与BC的延长线交于点G(如图②所示).若AB=
,CD=9,求线段BC和EG的长.
![](https://img.xkw.com/dksih/QBM/2018/1/31/1872110397571072/1876737513889792/STEM/c465e877ba72484c809364db23ccc585.png?resizew=388)
(1)求证:BC为⊙O的切线;
(2)连接AE并延长与BC的延长线交于点G(如图②所示).若AB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588c3822b7812e711b4ad86647b15dc1.png)
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【推荐1】如图1,
内接于
分别是
和
所对弧的中点,弦
分别交
于点
,连结![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61656a03470361811686d432ddf1f69c.png)
(1)求证:
是等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/a68c89c0-7b4c-4068-9685-001e21409a36.png?resizew=191)
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefa2a35b2496dcc88e1a8f5c9be4ab5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/dc3d40aa-8670-4ac2-aa32-22d6443b85de.png?resizew=186)
①如图2,当
为
的直径时,求
的长.
②当
将
的面积分成了
的两部分时,求
的长.
(3)连结
交
于点
,若
:则
的值为_______. (请直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fc11207395cfb17d59c4dabf0ce78f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546aa8cd51904e89a070d628f663cd4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61656a03470361811686d432ddf1f69c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0681a84b4368ae8d11ed813b1353232a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/a68c89c0-7b4c-4068-9685-001e21409a36.png?resizew=191)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefa2a35b2496dcc88e1a8f5c9be4ab5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/dc3d40aa-8670-4ac2-aa32-22d6443b85de.png?resizew=186)
①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaecf08a22124a457128fb04c9c02bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba4f6715bf770e7cdc7b0534f41c446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e7e01495050cca64f635c2c2658157.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/c89d7ad6-c4b5-4677-a199-d5d4f32b714a.png?resizew=193)
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【推荐2】已知抛物线y=ax2+bx+c(a≠0)与x轴交于A、B两点(点A在点B的左边),与y轴交于点C(0,﹣3),顶点
坐标为(1,﹣4).
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931332821065728/2938785760387072/STEM/9422d063-8306-4264-a1db-181c6b1c0572.png?resizew=451)
(1)求抛物线的解析式;
(2)如图1,抛物线在第四象限的图象上有一点M,求四边形ABMC面积的最大值及此时点M的坐标;
(3)如图2,直线CD交x轴于点E,若点P是线段EC上的一个动点,是否存在以点
、
、
为顶点的三角形与
相似.若存在,请直接写出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931332821065728/2938785760387072/STEM/9422d063-8306-4264-a1db-181c6b1c0572.png?resizew=451)
(1)求抛物线的解析式;
(2)如图1,抛物线在第四象限的图象上有一点M,求四边形ABMC面积的最大值及此时点M的坐标;
(3)如图2,直线CD交x轴于点E,若点P是线段EC上的一个动点,是否存在以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
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