1 . 如图,
中,
,
,G是
的重心,
的中点为D,以G为圆心,
长为半径画⊙G,过C点作⊙G的两切线段
,其中E、F为切点,则
与
的度数和为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/7c12bbf2-b66a-4f2a-8ce9-43c307464a35.png?resizew=114)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aef101d4dadcfe59be543f7504aa62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bec9ca32fdbc25ddacf2f0de74c23b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e47634c8bc677c86728a212247896b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4e2cb3ae71a29f7134e471b5e02837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1da12b51149bf0b494d8124e20489e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300c70a78c1bea9fd86f4f1b0270e069.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/7c12bbf2-b66a-4f2a-8ce9-43c307464a35.png?resizew=114)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:江苏省无锡市东林集团2022-2023学年九年级上学期期末数学试题
江苏省无锡市东林集团2022-2023学年九年级上学期期末数学试题江苏省无锡市2022-2023学年九年级上学期期末数学试题江苏省连云港市新海初级中学2022-2023学年九年级下学期3月月考数学试题(已下线)专题12选择压轴题(精选60道)-【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(苏科版)
2 . 如图,在
中,
,若
,
,点
是
上一点,且
,则
的值为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/04e87fc3-9376-448a-972c-bf54b90ea336.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7a4ee80d4d47517beea52285ce3dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a12c5cb8099cdabd53f97d32e817933.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/04e87fc3-9376-448a-972c-bf54b90ea336.png?resizew=136)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:浙江省嵊州市2022-2023学年九年级上学期期末考试数学试题
浙江省嵊州市2022-2023学年九年级上学期期末考试数学试题(已下线)专题07 锐角三角函数相关五类题型-【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(浙教版)浙江省舟山市定海二中教育集团2023-2024学年九年级上学期12月月考数学试题
3 . 在
中,
,若
的三边都放大2倍,则
的值( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
A.缩小2倍 | B.放大2倍 | C.不变 | D.无法确定 |
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4卷引用:湖南省岳阳市城区2022-2023学年九年级上学期期末教学质量监测数学试题
湖南省岳阳市城区2022-2023学年九年级上学期期末教学质量监测数学试题湖南省岳阳市岳阳楼区2022-2023学年九年级上学期期末数学试题湖南省岳阳市岳阳县2023-2024学年九年级上学期期末数学试题(已下线)专题01 锐角三角函数和特殊角的三角函数(六大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(浙教版)
4 . 多边形面积的求解有多种方法,通过不同方法的应用,可以求解某些边和角.
【基础掌握】在
中,
,
,
.求
的面积;
【灵活运用】在
中,
,
,
.求
的面积;
【迁移提升】如图,
的顶点都在边长为
的小正方形的顶点上,请直接写出
的值.
【基础掌握】在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a9896ee8415feccf06721dafc891b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62676bcf5f9783c0457fce09fe561a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8feb9fdc5582ad3e9853890ac2738d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
【灵活运用】在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c46711003fe312323931b220d11dee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b15a30db3b51ac54488b661f558b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6beb17d468d0e90f9c08a8dbbc05541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
【迁移提升】如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/9016d7af-cda6-4cc2-9d9c-12b88240b662.png?resizew=136)
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5 . 在
的网格中,每格小正方形的边长都是1,若
的三个顶点都在相应格点上,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a01b58184ef17d47645f361dcd5b187c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf01cce24cae39fa27acb2d0d7c5f4c5.png)
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3卷引用:河北省石家庄地区2022-2023学年九年级上学期期末考试数学试题
6 . 如图,边长为
的小正方形网格中,点
在格点上,过
三点的圆交
于点
,则
的正切值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/3c0b594d-1828-404a-a5f8-a54c28e3610c.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ebf9e3e07e7045023003a33b433f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144ed1bc3de2bf0d0ca1a4908a2b61e0.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/7cd1bc0388e7fad3e849ca39c67f5034.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/3c0b594d-1828-404a-a5f8-a54c28e3610c.png?resizew=134)
A.![]() | B.![]() | C.![]() | D.![]() |
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(已下线)九年级数学期末模拟卷02(浙江专用)(浙教版九年级上册+下册全部)-学易金卷:2023-2024学年初中上学期期末模拟考试浙江省宁波市海曙区2022--2022学年九年级上学期期末数学试卷浙江省宁波市海曙区2022-2023学年九年级上学期期末质量检测数学试题卷
名校
7 . 如图,在边长为1的小正方形网格中,点A,B,C,D都在这些小正方形的顶点上,
,
相交于点O,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/f047d1aa-11e6-433c-9e87-76ea8094259e.png?resizew=264)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065ee5d91403f592f9b8d672ecfbcd0e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/f047d1aa-11e6-433c-9e87-76ea8094259e.png?resizew=264)
A.![]() | B.2 | C.![]() | D.![]() |
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4卷引用:安徽省宣城市2022-2023学年九年级上学期数学期末调研试题
8 . 在
中,
,下列各式中,正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa79cdf8f5d2a621a13a7dc1b46bdb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:安徽省宣城市2022-2023学年九年级上学期数学期末调研试题
9 . 如图,在网格中,点
,
,
都在格点上,则
的正弦值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/a7c43337-3186-4569-809f-b94acd47cd08.png?resizew=156)
![](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/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/a7c43337-3186-4569-809f-b94acd47cd08.png?resizew=156)
A.![]() | B.![]() | C.![]() | D.2 |
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3卷引用:福建省泉州市永春县2022-2023学年九年级上学期期末考试数学试题
10 . 如图:在
中,
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2023/2/17/3176545087250432/3177617982955520/STEM/75a4d820640d42fe9ae268bb2634086c.png?resizew=248)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80eff52574ec119d2f52fa165da837ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac4b6e138df1ff677092e8aad75eb38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f2ef6adede39f93999919cda7d6d35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81e392b9cd8417000c57e1c0a0730be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eb28c1dbd04967f3eb66c7b42a91bc.png)
![](https://img.xkw.com/dksih/QBM/2023/2/17/3176545087250432/3177617982955520/STEM/75a4d820640d42fe9ae268bb2634086c.png?resizew=248)
A.![]() | B.![]() | C.![]() | D.![]() |
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