在平面直角坐标系
中,
的半径为2.对于
的弦
和
外一点C给出如下定义:若直线
,
中一条经过点O,另一条是
的切线,则称点C是弦
的“关联点”.
(1)如图,点
,
,
.
① 在点
,
,
中,弦
的“关联点”是:_______;
② 若点C是弦
的“关联点”,求点C的坐标;
(2)已知点
,
,对于线段
上一点S,存在
的弦
,使得点S是弦
的“关联点”.记
的长为t,当点S在线段
上运动时,直接t的最小值和最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/5a676f98-8719-452b-bf04-57120635617e.png?resizew=276)
(1)如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a25a7325d7f8e7360e2f381dd21676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae9dfa7caa7ea2ca09acc2b5911b1c1.png)
① 在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05eac98127e9f899447835462578a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3319c05673348b52b0fd8bda27c643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d03b7b8cafd801ca6436082fc3bd345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
② 若点C是弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b93e3f4eb68d7e137c034d9d32094be.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dac60a83ba27d9f8ac57765c93de96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e43d553398e15d44d47560edefe88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
更新时间:2023-10-16 09:53:25
|
相似题推荐
解答题-应用题
|
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【推荐1】根据以下情境信息,探索完成任务.
公路涵洞改造方案的设计与解决 | ||
情境1 | 图1是某公路涵洞,图2是其截面示意图,它由圆心在点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
情境2 | 现需对公路进行拓宽,改造成双向隔离车道,并同步拓宽涵洞,中间设置宽为![]() ![]() ![]() ![]() ![]() |
|
改造方案 | ||
方案一 | 如图4,将涵洞上半部分劣弧![]() ![]() |
|
方案二 | 如图5,将涵洞上半部分劣弧![]() |
|
问题解决 | ||
任务1 | 按方案一改造 | 以点![]() ![]() ![]() |
任务2 | 按方案二改造 | 求涵洞上半部分劣弧![]() |
任务3 | 隔离带最大宽度![]() | 要使高![]() ![]() ![]() ![]() ![]() ![]() |
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【推荐2】如图,在平面直角坐标系中,已知点
,以原点
为圆心,
为半径作圆.
从点
出发,以每秒
个单位的速度沿
轴负半轴运动,运动时间为
.连结
,将
沿
翻折,得到
.求
有一边所在直线与
相切时直线
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055bf10af73cd2fbdf2a949d473afed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af169e1a6c6c59af61c9d01f1d1dd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69159d31ed895504f11c66365b755d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c2910738a61030bf8a3967abd19b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c2910738a61030bf8a3967abd19b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/e7fb2e5e-1d1e-4d37-becb-9666e3560287.png?resizew=218)
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【推荐1】已知:如图,
是
的直径,
过
的中点D,
切
于点D, 交
于点E.
;
(2)如果
,
,求
的半径.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】阅读理解:
如图,在平面直角坐标系xOy中,点A与点B的坐标分别是
,
.
对于坐标平面内的一点P,给出如下定义:如果
,则称点P为线段AB的“等角点”
显然,线段AB的“等角点”有无数个,且A、B、P三点共圆.
设A、B、P三点所在圆的圆心为C,直接写出点C的坐标和
的半径;
轴正半轴上是否有线段AB的“等角点”?如果有,求出“等角点”的坐标;如果没有,请说明理由;
当点P在y轴正半轴上运动时,
是否有最大值?如果有,说明此时
最大的理由,并求出点P的坐标;如果没有请说明理由.
如图,在平面直角坐标系xOy中,点A与点B的坐标分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4db5cd35afd7da6256efa25c61c7341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbfca9082d108eae4d1d188584d61ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bea4b2605c4aab0c8e811cad6fcd0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb83be6567f7f70982a9d6c0af9cb663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee80e3f71815ba972fc0b366cd01c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ed5e3d39698f7c4d8369ed8a76a09c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ed5e3d39698f7c4d8369ed8a76a09c.png)
![](https://img.xkw.com/dksih/QBM/2018/5/24/1952092902490112/1952295561248768/STEM/744ddbd6840449f6b14216c41b2e12ac.png?resizew=157)
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解答题-证明题
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名校
【推荐1】如图1,在
中,
,
,点
是
边上一动点,连接
,把
绕点
顺时针旋转90°,得到
,连接
.
![](https://img.xkw.com/dksih/QBM/2021/5/6/2715175206969344/2721945873022976/STEM/b0bfc1fc-5fe4-4824-832e-8ab21ba9c506.png)
(1)如图1所示,若
,在
点运动过程中,当
时,求线段
的长.
(2)如图2所示,点
是线段
的中点,连接
并延长交
延长线于点
,连接
,交
于点
,连接
,
,当点
在线段
上时,求证:
.
(3)如图3,若
,将
绕点
顺时针旋转得
,连接
,
为线段
上一点,且
,连接
,将
绕点
顺时针旋转60°得到
,连接
,
为
的中点,连接
,请直接写出线段
的最大值.
![](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/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2021/5/6/2715175206969344/2721945873022976/STEM/b0bfc1fc-5fe4-4824-832e-8ab21ba9c506.png)
(1)如图1所示,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e50d0549670e2cdc1f3862ad6b07241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2所示,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4bbf8d70a51d5cd5d25e79d60c9c5c.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e9b4f916f9b6b4188a8cbd7044753e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,在矩形
中,已知
,点
是矩形
的边
延长线上一点,连接
,过顶点
作
,垂足为
,
交边
于点
.
![](https://img.xkw.com/dksih/QBM/2022/4/8/2958860541411328/2992739383336960/STEM/6f00deb6-7ce0-4d0c-bb99-872cab20005c.png?resizew=203)
(1)求证:
;
(2)连接
,求
的度数;
(3)作点
关于直线
的对称点
,连接
.猜想线段
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f1ad7c06f75bbfb90856772c7d611a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2530e73876e21d8ca192847dd80579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2022/4/8/2958860541411328/2992739383336960/STEM/6f00deb6-7ce0-4d0c-bb99-872cab20005c.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9be295c988fe9fcca689dfd412b592.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5806d4fc9cec11b162bb3747e718ab65.png)
(3)作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69fc7cddda902f75c7b2404ea016880.png)
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