1 . 如图,已知正方形
,将正方形
绕点A旋转
得到正方形
,其中点E与点B对应,点F与点C对应,点G与点D对应,若直线
交直线
于点O,
,则
的长是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/5f8fa908-7cc8-49c4-8763-7b4a6d9d62d7.png?resizew=116)
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2024九年级下·全国·专题练习
2 . 如图,在
中,
,定义:斜边与
的对边的比叫做
的余割,用“
”表示.如设该直角三角形的三边分别为a,b,c,则
,那么下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70cf462d79ca447d57b92166706f1879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de4fe2b8eed657105fe1337ec156de8.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 如图,在平面直角坐标系中,O为原点,点
,点M在第一象限内,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/c9efacab-1633-4da9-b945-aa568e9c852c.jpg?resizew=166)
(1)求点M的坐标.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96428d61b450c1a62f12a2e411c67b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc96d5e84e526643a2d674779888b302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a4b53aff3ffb51501aef1a40a279f2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/c9efacab-1633-4da9-b945-aa568e9c852c.jpg?resizew=166)
(1)求点M的坐标.
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66ffc19775a901b46f16d2d8973362d.png)
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2023-12-23更新
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6卷引用:安徽省合肥市包河区2019-2020学年九年级上学期12月月考数学试题
4 . 如图,菱形
的对角线
,
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c499d3ef329f85e59fd72dec6f453bbc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/d681ff45-7cfb-4e0b-bdeb-7b6decb9c4b8.png?resizew=236)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 在
中,
,若
,则
=_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64e907da0a0ab36a8de61d253bb9617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e45b53a127d849c62bebf81b6ddb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06226608e5e7c480ad73d3b36912a74f.png)
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2卷引用:第34章 锐角三角函数 单元测试卷 人教 版(五四制)九年级下册数学
6 . 如图,在
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d488a0fa741eb71051e38cd4edf00a54.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d488a0fa741eb71051e38cd4edf00a54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/2/d9596337-38e9-4d9d-8f18-3d62c038cdc7.png?resizew=163)
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2023九年级下·全国·专题练习
7 . 如图所示,
是
的直径,弦
,
相交于
,则
等于( )
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150400192249856/3151107379806208/STEM/f9caf506c494482a9d1b7791294b6aba.png?resizew=121)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10517f770b668568191d1228f21eb30.png)
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150400192249856/3151107379806208/STEM/f9caf506c494482a9d1b7791294b6aba.png?resizew=121)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
8 . 我们都知道蜂巢是很多个正六边形组合来的.正六边形蜂巢的建筑结构密合度最高、用材最少、空间最大、也最为坚固.如图,某蜂巢的房孔是边长为6的正六边形
,若
的内接正六边形为正六边形
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/e3a2d06e-ce28-4850-af39-d8dc9b4a63d1.png?resizew=304)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/e3a2d06e-ce28-4850-af39-d8dc9b4a63d1.png?resizew=304)
A.12 | B.![]() | C.![]() | D.![]() |
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3卷引用:北京市昌平区2022-2023学年九年级上学期期末数学试卷
北京市昌平区2022-2023学年九年级上学期期末数学试卷(已下线)第18讲 圆内接正多边形-【帮课堂】2022-2023学年九年级数学下册同步精品讲义(北师大版)四川省南充市顺庆区南充高级中学2023-2024学年九年级上学期12月月考数学试题
9 . 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/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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上海市杨浦区2022-2023学年九年级上学期期中绿色指标监测数学试题(已下线)专题05锐角三角比相关概念(上海15区46题)-学易金卷:2023年中考数学一模试题分项汇编(上海专用)上海市金山区上海市张堰第二中学2022-2023学年九年级上学期期末数学试题(已下线)第01讲 锐角三角函数和特殊角的三角函数(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(人教版)(已下线)第01讲 锐角三角函数和特殊角的三角函数(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)福建省泉州实验中学2023-2024学年九年级上学期第一次月考数学试题(已下线)第01讲 锐角三角函数和特殊角的三角函数(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(苏科版)(已下线)第01讲 锐角三角函数和特殊角的三角函数(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(浙教版)(已下线)专题13正切、正弦、余弦(5个知识点5种题型)-【帮课堂】2023-2024学年九年级数学下册同步学与练(苏科版)
10 . 在
中,
,那么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/5041338d080994400b56eaf39bb71536.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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