如图,AB是⊙O的直径,点C在⊙O上,且AC=8,BC=6.
于点D,连接CD(保留作图痕迹,不写作法);
(2)在(1)所作的图形中,求点O到AC的距离及sin∠ACD 的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
(2)在(1)所作的图形中,求点O到AC的距离及sin∠ACD 的值.
2022·广东广州·中考真题 查看更多[12]
2022广东省广州市中考数学真题2023年新疆乌鲁木齐市中考数学一模试题福建省福州外国语学校2022-2023学年九年级下学期期中数学试题(已下线)专题1.3 解直角三角形(能力提升)-2022-2023学年九年级数学下册《同步考点解读·专题训练》(北师大版)2023年四川省攀枝花市第十二中学中考数学一模试卷2023年河南省商丘市夏邑县中考一模数学试题(已下线)第02讲 解直角三角形(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02讲 解直角三角形(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)(已下线)第02讲 解直角三角形(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02讲 解直角三角形(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)2023年河南省商丘市夏邑县普通高中招生第一次模拟考试数学模拟试题2023年贵州省中考数学考向信息模拟预测题
更新时间:2022-07-18 10:38:05
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相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】已知:如图,在△ABC中,AB=AC,∠A=36°.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/6c11b75b-5803-4861-89ce-c75dbdcdd310.png?resizew=150)
(1)尺规作图:作AB的垂直平分线MN交AC于点D,连接BD;(保留作图痕迹,不写作法)
(2)求∠DBC的度数。
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/6c11b75b-5803-4861-89ce-c75dbdcdd310.png?resizew=150)
(1)尺规作图:作AB的垂直平分线MN交AC于点D,连接BD;(保留作图痕迹,不写作法)
(2)求∠DBC的度数。
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解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/8d5015b4-478e-4229-9ce2-e9c9efaa0184.png?resizew=156)
(1)尺规作图:作
的平分线
,交
于点
;作线段
的垂直平分线交AC于点
,交
于点
;连接
,
(不写做法,保留作图痕迹);
(2)在(1)的条件下,证明:
.
证明:∵GF垂直平分线段
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
∴
,①
∵
平分
,
∴② ,
∵在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5c2a9b034e26afedba99a1c79e3ff9.png)
∴
,
∴④ ,
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/8d5015b4-478e-4229-9ce2-e9c9efaa0184.png?resizew=156)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
(2)在(1)的条件下,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9d6125a8806ff6923c3e4ccbdf1de5.png)
证明:∵GF垂直平分线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd02aa31b79fc5929f2c29d917810c4.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
∴② ,
∵在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147789d0ff172722271b095568f58a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e1592afb8b7e327eddeaee2a8b35e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5c2a9b034e26afedba99a1c79e3ff9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95317a39e3ab6804ae2fb522b594f75c.png)
∴④ ,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9d6125a8806ff6923c3e4ccbdf1de5.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】矩形
中,
为
上的一点,把
沿
翻折,使点
恰好落在
边上的点
.
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/d65b28b8-e8d4-4557-8a03-31f918cb0c2d.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884d06413db0b477e8aaf423467f5769.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bae5203f4b4acf23779114b3466e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-计算题
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适中
(0.65)
【推荐2】计算:(1)
;
(2)直角三角形
中,
是斜边
的中点,两直角边
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386f6cb4383803b0cb4ad7605b7befa7.png)
(2)直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753337145049088/2774534221553664/STEM/dcf56cbf-ce9d-41e5-9e95-429ce4a976ac.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
名校
【推荐1】如图,
是
的外接圆,
是
的直径,
于点
.
;
(2)连接
并延长,交
于点
,交
于点
,连接
.若
的半径为5,
,求
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba77f66ecad8eb4a7a63f169f28a3b7.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863544b6162ca5c8bc38ade2fc28f8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
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解答题-问答题
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适中
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名校
【推荐2】如图,已知⊙O的半径为2,弦BC的长为
,点A为弦BC所对优弧上任意一点(B,C两点除外).
(1)求圆心O到弦BC的距离;
(2)求△ABC面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求圆心O到弦BC的距离;
(2)求△ABC面积的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/afa1f7ac-09f7-4525-a8a2-26ea782ecde7.png?resizew=170)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,由小正方形构成的
网格,每个小正方形的顶点叫做格点,且每个小正方形的边长为1.
经过
,
,
三个格点,仅用无刻度的直尺在给定网格中按要求画图.(保留作图痕迹)
(1)在图中的圆中作出圆心
和弧
的中点
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/94badc20-8823-4b1e-8675-c5c765cde14a.png?resizew=153)
(2)在图中的弧
上找一点
,使
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/c2556a07-1aaf-42fc-9ff6-8d8b6bba77f3.png?resizew=168)
(3)在图中的弧
上找一点
,使
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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)
(1)在图中的圆中作出圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/94badc20-8823-4b1e-8675-c5c765cde14a.png?resizew=153)
(2)在图中的弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20e6123345ee13a650c3223291123dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/c2556a07-1aaf-42fc-9ff6-8d8b6bba77f3.png?resizew=168)
(3)在图中的弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d197ea8c1c8bbdf5edade431388eb713.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/9a5143a7-872f-4e4c-9c32-2454c958102e.png?resizew=188)
您最近一年使用:0次
【推荐2】如图,在
中,
,
,点
在
上,点
在
上,
,连接
,
,
,垂足为
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093db5b63dfd1ac4c84692a168f7ace0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03ca3e334c5290ab28b4b4a883c90c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abf4ebac2769eec53d410c7532cd101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55963a9b9b02737110f57a377b41cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4279b633e860e707c8535adbf191a9.png)
![](https://img.xkw.com/dksih/QBM/2020/8/21/2532611129106432/2532753019420672/STEM/0f08bcc7117744c2ae0baaacae3dbaec.png?resizew=202)
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