名校
1 . 已知,在半圆
中,直径
,点
、
在半圆
上运动,(点
、
可以与A、
两点重合),弦
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/b2a5f2ba-e887-485d-ad17-92a0efe0eaf2.png?resizew=629)
(1)如图1,当
时,求证:
;
(2)如图2,若
时,求图中阴影部分(弦
、直径
、弧
围成的图形)的面积;
(3)如图3,取
的中点
,点
从点A开始运动到点
与点
重合时结束,在整个运动过程中:
①求点
到
的最小值距离;
②直接写出点
的运动路径长______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/b2a5f2ba-e887-485d-ad17-92a0efe0eaf2.png?resizew=629)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f7abf31402fcfd6f86fb434adc37d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99c9b81535f77e6c4ac21a33b9a75ba.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e08c088f4281baf6c431ca4ee1fa0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)如图3,取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
名校
2 . 如图,以△ABC的BC边上一点O为圆心的圆,经过A、B两点,且与BC边交于点E,DO⊥BE于点O,连接AD交BC于F,若AC=FC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/3f60350c-f81f-41d8-9edf-8a5c2511c9c1.png?resizew=265)
(1)求证:AC是⊙O的切线:
(2)若BF=8,DF=
,求⊙O的半径;
(3)若∠ADB=60°,BD=1,求阴影部分的面积.(结果保留根号)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/3f60350c-f81f-41d8-9edf-8a5c2511c9c1.png?resizew=265)
(1)求证:AC是⊙O的切线:
(2)若BF=8,DF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cbb271baca5cd015f30e07d9eebfd8.png)
(3)若∠ADB=60°,BD=1,求阴影部分的面积.(结果保留根号)
您最近一年使用:0次
2022-07-24更新
|
483次组卷
|
4卷引用:广东省湛江市麻章区2020-2021学年九年级上学期期末数学试题
2022九年级上·全国·专题练习
3 . 已知
为三角形
的内心,连接
交三角形
的外接圆于点
,如图所示,连接
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/5801c612-9632-4694-83ad-75fe80fddf26.png?resizew=311)
(1)求证:
.
(2)
,
,
,求AD.
(3)在(2)的条件下,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42774a918f52ac8aa8b1f5b78a676f17.png)
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/5801c612-9632-4694-83ad-75fe80fddf26.png?resizew=311)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4727ee17e96ca9d6f957d1ecb64ccbb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
(3)在(2)的条件下,求阴影部分的面积.
您最近一年使用:0次
4 . 如图,在
中,
为
的直径,PA与
相切于点A,点C在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/13244c20-036a-4a91-9c4e-0a417b5d8b06.png?resizew=297)
(1)求证:
与
相切;
(2)过点C作
,交
于点D,若
,则图中阴影部分的面积为 .
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eea328811717ab763fe1f97babcc754.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/13244c20-036a-4a91-9c4e-0a417b5d8b06.png?resizew=297)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7085ecc71465a59cf36c2a57b7d89e.png)
您最近一年使用:0次
2022-12-04更新
|
231次组卷
|
2卷引用:江苏省南京市秦淮区2022-2023学年九年级上学期期中数学试题
解题方法
5 . 如图,已知
,
为
的直径,过点A作弦
垂直于直径
于F,点B恰好为
的中点,连接
,
.
![](https://img.xkw.com/dksih/QBM/2022/6/6/2997906919137280/3125049086681088/STEM/342dcdc266cd441da3a087844c4beb9d.png?resizew=150)
(1)求证:
;
(2)若
,求
的半径;
(3)在(2)的条件下,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2022/6/6/2997906919137280/3125049086681088/STEM/342dcdc266cd441da3a087844c4beb9d.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2291de85a2a29ff360a4515cce99c804.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941eba4dbc1094107e1eeb02c8d8cd56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)在(2)的条件下,求阴影部分的面积.
您最近一年使用:0次
2022-12-06更新
|
839次组卷
|
9卷引用:2020年广东省深圳市龙岗区九年级二模数学试题
2020年广东省深圳市龙岗区九年级二模数学试题广东省深圳市龙岗区2019-2020学年九年级下学期调研数学试题贵州省贵阳市2022年中考数学模拟卷(四)(已下线)第3章 圆的基本性质(B卷·能力提升练)-【单元测试】2022-2023学年九年级数学上册分层训练AB卷(浙教版)2022年山东省临沂市九年级中考数学全真模拟试题(一)(已下线)第二十四章 圆(A卷·知识通关练)-【单元测试】2022-2023学年九年级数学上册分层训练AB卷(人教版,广东专用)(已下线)第05课时 正多边形与圆、扇形的弧长与面积-2022-2023学年九年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)第二十八章 圆 28.5 弧长和扇形面积的计算冀教版九年级上册课后作业(已下线)2024年湖北省初中学业水平考试一模考试数学试题及变式题21-24题
名校
6 . 如图,在
中,点A是边BE上一点,以AB为直径的
与CE相切于点D,
,点F为OC与
的交点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/a9d41faf-5a08-45d6-8ff0-a72be83c3c8c.png?resizew=186)
(1)求证:CB是
的切线;
(2)连接DB与OC交于点G,
,
,求阴影部分面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9204fa555e4c2945323c6c49116ccfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/a9d41faf-5a08-45d6-8ff0-a72be83c3c8c.png?resizew=186)
(1)求证:CB是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接DB与OC交于点G,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d48852ad433b0da21abf5be0f79260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fb9a3d61c62c86cde849e519e6bb8c.png)
您最近一年使用:0次
7 . 如图,已知⊙C过菱形ABCD的三个顶点B,A,D,连结BD,过点A作AE
BD交射线CB于点E.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932746499391488/3058353038966784/STEM/65cac578d6df4c87a01ce849ef9eac15.png?resizew=226)
(1)求证:AE是⊙C的切线.
(2)若半径为2,求图中阴影部分的面积.
(3)在(2)的条件下,在⊙C上取点F,连结AF,使∠DAF=15°,求点F到直线AD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932746499391488/3058353038966784/STEM/65cac578d6df4c87a01ce849ef9eac15.png?resizew=226)
(1)求证:AE是⊙C的切线.
(2)若半径为2,求图中阴影部分的面积.
(3)在(2)的条件下,在⊙C上取点F,连结AF,使∠DAF=15°,求点F到直线AD的距离.
您最近一年使用:0次
8 . 已知I为三角形ABC的内心,连接AI交三角形ABC的外接圆于点D,如图所示,连接BD和CD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/8e34296d-d01b-4a92-b239-6333d6787876.png?resizew=257)
(1)求证:
.
(2)
,
,
,求AD.
(3)在(2)的条件下,求阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/8e34296d-d01b-4a92-b239-6333d6787876.png?resizew=257)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4727ee17e96ca9d6f957d1ecb64ccbb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
(3)在(2)的条件下,求阴影部分的面积.
您最近一年使用:0次
9 . 如图,⊙O的直径AB=2
,点C为⊙O上一点,CF为⊙O的切线,OE⊥AB于点O,分别交AC,CF于D,E两点.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2952829603061760/2953164934176768/STEM/e1c0401488cc48d0885e8a187cb842c7.png?resizew=146)
(1)求证:ED=EC;
(2)若∠A=30°,求图中两处(点C左侧与点C右侧)阴影部分的面积之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2022/4/7/2952829603061760/2953164934176768/STEM/e1c0401488cc48d0885e8a187cb842c7.png?resizew=146)
(1)求证:ED=EC;
(2)若∠A=30°,求图中两处(点C左侧与点C右侧)阴影部分的面积之和.
您最近一年使用:0次
10 . 如图,在
中,
,以
为直径的
分别与
,
交于点
,
,过点
作
,垂足为点
.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2968004250615808/2970189469220864/STEM/e94c0751-d9f1-4031-926b-3da0ca80acdc.png?resizew=149)
(1)求证:直线
是
的切线;
(2)求证:
;
(3)若点
是半圆
的一个三等分点,求出阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d2649a844e8619de4663a03c233f0.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2022/4/28/2968004250615808/2970189469220864/STEM/e94c0751-d9f1-4031-926b-3da0ca80acdc.png?resizew=149)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f26831f3a2fa3701a0531a54f0f101.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1776d156423ea523de87fbca6c0b6019.png)
您最近一年使用:0次