如图,已知
为
的直径,点C为圆上一点,
垂直于过点C的直线,交
于点E,垂足为点D,
平分
.
是
的切线;
(2)若
,
,求
的长.
![](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/03902478df1a55bc99703210bccab910.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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
2023·西藏·中考真题 查看更多[5]
2023年西藏自治区中考数学真题河南省商丘市民权县2023-2024学年九年级上学期期末数学试题2024年西藏九年级中考数学一模考前模拟试题(已下线)重难点04+圆的基本性质及直线与圆的位置关系(11大题型+满分技巧+限时分层检测)1(已下线)专题07 圆中的相关计算问题(五大热点题型)-2024年中考数学二轮热点题型归纳与变式演练(云南专用)
更新时间:2023-10-08 11:09:56
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】如图, A,
是半圆
上的两点,
是
的直径,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988425975865344/2991103875129344/STEM/49cce8ee-9e29-4973-9292-fb5581f34025.png?resizew=182)
(1)在
上求作一点
,使得
最短;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/f03d2fb1ecb2e36fb24bb21f80e07a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988425975865344/2991103875129344/STEM/49cce8ee-9e29-4973-9292-fb5581f34025.png?resizew=182)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f61ec7cb63b762551db9f3ab79b3aa4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f61ec7cb63b762551db9f3ab79b3aa4.png)
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【推荐2】如图,
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
,以AC为直径作
,点D是
上一点,
,过点D作DE⊥BC,交BC的延长线于E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/2ece55df-dd66-4409-9573-3db5ea393346.png?resizew=135)
(1)求证:CD平分
;
(2)判断直线ED与
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2db3d4c0c8744eac0dc8b8c01f04ef.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/8aca9d6bb94a12f2eea005e573b7d597.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/2ece55df-dd66-4409-9573-3db5ea393346.png?resizew=135)
(1)求证:CD平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
(2)判断直线ED与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐1】如图,在ΔABC中,点O是BC中点,以O为圆心,BC为直径作圆,刚好经过A点,延长BC于点D,连接AD.已知∠CAD=∠B.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899128025341952/2916917455028224/STEM/487cc0731f734863a42773ddc13b7283.png?resizew=209)
(1)求证:AD是
O的切线;
(2)求证:ΔACD~ΔBAD;
(3)若BD=8,tanB=
,求⊙O的面积.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899128025341952/2916917455028224/STEM/487cc0731f734863a42773ddc13b7283.png?resizew=209)
(1)求证:AD是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
(2)求证:ΔACD~ΔBAD;
(3)若BD=8,tanB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐2】如图,已知△ABC内接于⊙O,AC是⊙O的直径,D是
的中点,过点D作直线BC的垂线,分别交CB、CA的延长线E、F
![](https://img.xkw.com/dksih/QBM/2013/5/16/1573651711795200/1573651717308416/STEM/4eaf095c1beb44188ce8237866d81cfb.png)
(1)求证:EF是⊙O的切线;
(2)若EF=12,EC=9,求⊙O的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c402fc152af7d1ec3025e41e670dd3.png)
![](https://img.xkw.com/dksih/QBM/2013/5/16/1573651711795200/1573651717308416/STEM/4eaf095c1beb44188ce8237866d81cfb.png)
(1)求证:EF是⊙O的切线;
(2)若EF=12,EC=9,求⊙O的半径.
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【推荐1】已知直线l与⊙O相切于点C,,AB是⊙O的直径,AD⊥l于点D.
(2)如图②,当直线l与⊙O相交于点E、F时,若∠DAE=18°,求∠BAF的大小.
(2)如图②,当直线l与⊙O相交于点E、F时,若∠DAE=18°,求∠BAF的大小.
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【推荐2】如图,已知三角形
中,
,D是
的外接圆劣弧
上的点(不与点A,C重合),延长
至E.
(1)求证:
的延长线平分![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
(2)若
,
中
边上的高为
,求外接圆的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/5a65771a-f22e-4a61-8b5a-ead2033f5886.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
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【推荐1】在中俄“海上联合﹣2014”反潜演习中,我军舰A测得潜艇C的俯角为30°,位于军舰A正上方1000米的反潜直升机B测得潜艇C的俯角为68°,试根据以上数据求出潜艇C离开海平面的下潜深度.(结果保留整数,参考数据:sin68°≈0.9,cos68°≈0.4,tan68°≈2.5,
1.7)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665c3b7da1695450500ee9711a24ebf7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/2dc3790f-3c2e-46b9-a08d-bba0764be3d2.png?resizew=155)
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【推荐2】如图,一高尔夫球从山坡下的点
处打出一球,球向山坡上的球洞点
处飞去,球的飞行路线为抛物线.如果不考虑空气阻力,当球达到最大高度
时,球移动的水平距离为
.已知山坡
与水平方向
的夹角为30°,
、
两点间的距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/974d580e-a50f-4bc9-986d-3d8a1b02e2c0.png?resizew=243)
(1)建立适当的直角坐标系,求这个球的飞行路线所在抛物线的函数表达式.
(2)这一杆能否把高尔夫球从点
处直接打入点
处球洞?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a276be57f98560667fd0b54aed088437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54b7734aea416e10d3bd875ab21f459.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/974d580e-a50f-4bc9-986d-3d8a1b02e2c0.png?resizew=243)
(1)建立适当的直角坐标系,求这个球的飞行路线所在抛物线的函数表达式.
(2)这一杆能否把高尔夫球从点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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