已知
是半径为6的圆的一条弦,若
,则
所对圆周角的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30e51d3170d01d7c227b71902e25626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() ![]() | C.![]() ![]() | D.![]() |
23-24九年级上·辽宁盘锦·阶段练习 查看更多[2]
辽宁省盘锦市大洼区第二中学2023-2024学年 九年级上第一次月考数学试题(已下线)易错06+圆1(六大易错分析+避坑大招+学以致用+易错题通关)-备战2024年中考数学考试易错题(全国通用)
更新时间:2024-01-07 13:55:03
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【推荐1】下列说法正确的有:①
;②等腰三角形的高、中线、角平分线互相重合;③等边三角形是等腰三角形;④顶角相等的两个等腰三角形全等;其中正确的共有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba2389b3290ec1c34df67fc52a24db5a.png)
A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐2】如图,在等边
中,D为BC边上的中点,以A为圆心,AD为半径画弧,与AC边交点为E,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/72c67003-8431-4a6f-a05e-85d8f12104f7.png?resizew=151)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/72c67003-8431-4a6f-a05e-85d8f12104f7.png?resizew=151)
A.60° | B.105° | C.75° | D.15° |
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【推荐1】如图,点A、B、C在⊙O上,若∠A=∠C=35°,则∠B的度数等于( )
![](https://img.xkw.com/dksih/QBM/2020/1/16/2378488823734272/2379962749755393/STEM/5773a5eab2f047798017b5ed13f3931d.png?resizew=123)
![](https://img.xkw.com/dksih/QBM/2020/1/16/2378488823734272/2379962749755393/STEM/5773a5eab2f047798017b5ed13f3931d.png?resizew=123)
A.65° | B.70° | C.55° | D.60° |
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【推荐2】如图,△ABC 内接于⊙O,∠A=68°,则∠OBC 等于( )
![](https://img.xkw.com/dksih/QBM/2019/1/24/2125425203011584/2126400739172352/STEM/1e0a2599cd274947b5a7776d158c5ca6.png?resizew=120)
![](https://img.xkw.com/dksih/QBM/2019/1/24/2125425203011584/2126400739172352/STEM/1e0a2599cd274947b5a7776d158c5ca6.png?resizew=120)
A.22° | B.26° | C.32° | D.34° |
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【推荐1】如图,⊙
的半径为
,四边形
内接于⊙
,连接
,若
,则
的长为()
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/9647d37063c643a5b1cc55b437a6b520.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/e264d272c9b24ea3a67f9923b6a1fb85.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/671a6bca452642ee9cd423316c029d37.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/31046337c8d142b9abc72cbf9a120f1c.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/e264d272c9b24ea3a67f9923b6a1fb85.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/88091ac5365d40f98654f2ac830a4d45.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/5edbf7d273634df8ab2075cc96bef674.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/33cad34beb684bc19db9592861e98c7a.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762103050240/1773762103197696/STEM/9647d37063c643a5b1cc55b437a6b520.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,⊙O的内接△ABC的外角∠ACE的平分线交⊙O于点D.DF⊥AC,垂足为F,DE⊥BC,垂足为E.给出下列4个结论:①CE=CF;②∠ACB=∠EDF;③DE是⊙O的切线;④
.其中一定成立的是( )
![](https://img.xkw.com/dksih/QBM/2020/2/17/2400813940367360/2401151505973248/STEM/d31d48d24a6f4f24b643d2709f3b8b13.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da365cd03ac7a9354ae18d6aae8da38.png)
![](https://img.xkw.com/dksih/QBM/2020/2/17/2400813940367360/2401151505973248/STEM/d31d48d24a6f4f24b643d2709f3b8b13.png?resizew=135)
A.①②③ | B.②③④ | C.①③④ | D.①②④ |
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【推荐1】如图所示,在
中,
于
,
于
,且
,已知
,
,那么
等于( )
![](https://img.xkw.com/dksih/QBM/2018/9/29/2042895108775936/2044311012622336/STEM/fc584c127b1146fb965aad271fca5362.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ff9d4fdd0d176042505b7aac016852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79fecb0de8722100cf0735bcaab2854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909220d1db380634534190b662ee0a7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a95b0e474d6837a96d828fa4f64ba4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aaa59f38eae8887cf4c5de4f69b0e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850f8372ededc0bbef29ed8383da9775.png)
![](https://img.xkw.com/dksih/QBM/2018/9/29/2042895108775936/2044311012622336/STEM/fc584c127b1146fb965aad271fca5362.png?resizew=126)
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【推荐2】如图,点A是双曲线
在第二象限分支上的一个动点,连接AO并延长交另一分支于点B,以AB为底作等腰△ABC,且∠ACB=120°,点C在第一象限,随着点A的运动,点C的位置也不断变化,但点C始终在双曲线
上运动,则k的值为( )
![](https://img.xkw.com/dksih/QBM/2015/9/6/1573910033473536/1573910038749184/STEM/4f38c810e88e46f4bd7e5c5e76eaeb93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752f80003886f8e6bdcd8e77280450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2015/9/6/1573910033473536/1573910038749184/STEM/4f38c810e88e46f4bd7e5c5e76eaeb93.png)
A.1 | B.2 | C.3 | D.4 |
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