如图,
是
的切线,A为切点,
是
的弦,过点
作
于点
.若
,
,
.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/68d38d72-278d-45d9-91d4-769c598feb4b.jpg?resizew=169)
(1)
的半径;
(2)弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870fa9709a70b3d99118b4b671fb016f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870fa9709a70b3d99118b4b671fb016f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b94bf925e270d4f20bc70881d9b3e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df427a58aa333bc742b58cafd6c630d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06d7b1358e6c488819cf7ccc142d62c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/68d38d72-278d-45d9-91d4-769c598feb4b.jpg?resizew=169)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(2)弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
更新时间:2023-02-10 15:57:42
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【推荐1】如图,大正方形由四个全等的直角三角形和一个小正方形拼接成的,若直角三角形的两条直角边长为
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(1)用含有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d7aa815d046dac3d1ee1698206d8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71e0a2c2a72e1ec58653a85e54fff74.png)
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【推荐2】如图,在平面直角坐标系中,已知△AOB是等边三角形,点A的坐标是(0,3),点B在第一象限,点P是x轴上的一个动点,连结AP,并把△AOP绕着点A按逆时针方向旋转,使边AO与AB重合,得到△ABD.当点P运动到点(
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![](https://img.xkw.com/dksih/QBM/2015/5/5/1573834464968704/1573834471219200/STEM/e939dfcdbdc44a32ba1ee29ba1f0663d.png)
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【推荐1】如图,
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【推荐2】如图,AB是圆O的直径,弦CD⊥AB于点E,G是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
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![](https://img.xkw.com/dksih/QBM/2021/11/12/2849685119516672/2851326218092544/STEM/92cef12ac7ec423c9b19386d07ab9379.png?resizew=110)
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名校
【推荐1】 如图,
是⊙O的直径,点C是⊙O上一点,
与过点C的切线垂直,垂足为点D,直线
与
的延长线相交于点P,弦
平分
,交
于点F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/264fa714-0fbf-4efc-bcac-f252249aaf2e.png?resizew=167)
(1)求证:
平分
;
(2)若
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/264fa714-0fbf-4efc-bcac-f252249aaf2e.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2e59adb72e5bac676270c667b1a691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4e3f1e9693a806272a3d743d31ba67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】已知AB是⊙O的直径,C为⊙O上一点,∠OAC=58°.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/f75c5c8d-c5a9-4e9e-814d-f7f0726425d0.png?resizew=345)
(Ⅰ)如图①,过点C作⊙O的切线,与BA的延长线交于点P,求∠P的大小;
(Ⅱ)如图②,P为AB上一点,CP延长线与⊙O交于点Q.若AQ=CQ,求∠APC的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/f75c5c8d-c5a9-4e9e-814d-f7f0726425d0.png?resizew=345)
(Ⅰ)如图①,过点C作⊙O的切线,与BA的延长线交于点P,求∠P的大小;
(Ⅱ)如图②,P为AB上一点,CP延长线与⊙O交于点Q.若AQ=CQ,求∠APC的大小.
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