如图,
为
的直径,点
在
上,
垂直过点
的直线于点
,
平分
.
(1)求证:
是
的切线;
(2)若
,
,求
.
![](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/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/14c5a703-2c42-4985-b9d5-264036785fc2.png?resizew=143)
(1)求证:
![](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/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b732912cec85d7818ba891cdf82ed.png)
更新时间:2023-08-06 17:23:59
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知 AB、AC 分别为⊙O 的直径和弦,D 为弧 BC 的中点,DE⊥AC 于 E,DE=6,AC=16.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/262e6444-0a91-4c80-8fec-bad8cf40697e.png?resizew=167)
(1)求证:DE 是⊙O 的切线;
(2)求直径AB的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/262e6444-0a91-4c80-8fec-bad8cf40697e.png?resizew=167)
(1)求证:DE 是⊙O 的切线;
(2)求直径AB的长.
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知直线PA交⊙O于A、B两点,AE是⊙O的直径,点C为⊙O上一点,且AC平分∠PAE,过C作CD⊥PA,垂足为D.
![](https://img.xkw.com/dksih/QBM/2015/3/20/1573814269091840/1573814274637824/STEM/36f47cf5fda6464e8fff4ad225a6aebf.png)
(1)求证:CD为⊙O的切线;
(2)若DC=4,AC=5,求⊙O的直径的AE.
![](https://img.xkw.com/dksih/QBM/2015/3/20/1573814269091840/1573814274637824/STEM/36f47cf5fda6464e8fff4ad225a6aebf.png)
(1)求证:CD为⊙O的切线;
(2)若DC=4,AC=5,求⊙O的直径的AE.
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解答题-问答题
|
适中
(0.65)
【推荐1】一款手动铡切刀的侧面示意图如图1所示,圆弧形刀刃
和手柄
构成刀身,点M,P,Q总在一直线上,
与切割槽
在转轴(点Q)处连接.延长支撑杆
交切割槽
于点K,当铡切刀绕点Q旋转时,
与
的另一个交点为T(图3),已知
.
与
相切时,
,求弦
和
的长;
(2)如图3,在铡切刀从与
相切的位置开始下降的过程中(点P未经过
),判断
的度数是否改变,若改变说明理由;若不改变,求出
的度数.
(结果保留一位小数,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7380bc8833adf1607ef93a86eb7f1c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68656f37021fb3edc9cc0c3fa5bad248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
(2)如图3,在铡切刀从与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79f5023e47d84607ee3b02a96305460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79f5023e47d84607ee3b02a96305460.png)
(结果保留一位小数,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb23d75327ca72a7870c63fd1451f35d.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图1,在
中,
,
,
,点
是射线
上一动点,过点
作
的垂线,交射线
于点
,交射线
于点
,连结
.
(1)当
时,求
的长;
(2)如图2,当
时,求
的长;
(3)连结
,在点
的整个运动过程中,当
是等腰三角形时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/2f3ad6b4-bb6f-4fb9-a13f-054ce5456ca0.png?resizew=298)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1330569b47697ad0897ff9fcabc590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b831f8d32299736fed7ffab8b2d44a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
您最近一年使用:0次