如图,四边形
内接于⊙O,
,延长
到点E,使得
,连接
.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca4fa129b5352b0bf5542965098ea0c.png)
(2)若
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b59f0e6f7fa9c50e7f5cc146ba1af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/2dbae316-b687-4ef1-b5c4-032c90925a85.png?resizew=288)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca4fa129b5352b0bf5542965098ea0c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcfaf93da169b266db050f095be1dd37.png)
更新时间:2023-07-30 10:56:23
|
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解答题-证明题
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适中
(0.65)
名校
【推荐1】如图,A,B,C,D依次在同一条直线上,AB=CD,AE=DF,∠A=∠D,BF与EC相交于点M.求证:MC=MB.
![](https://img.xkw.com/dksih/QBM/2022/3/27/2945338833526784/2946607065161728/STEM/dcb32231031943ec8e1dc20bc8bdebd3.png?resizew=174)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】如图1,在
中,
,点
是
的中点,以点
为圆心,
的长为半径作弧交
于点
,连接
,作
的平分线交
于点
,延长
到
,使
.
;
(2)连接
,
.
①如图2,判断四边形
的形状,并证明;
②如图3,若
为等边三角形,其他条件不变,已知等边
的边长为4,求
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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efab9fb00e0480cd350a59cdc7b3bdf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049a9c310ec44a637143e24b5a7414b0.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
①如图2,判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
②如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79c5041878c15de69253ca11a03ab1b.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,已知AB是⊙O的弦,OB=2,∠B=30°,C是弦AB上任意一点(不与点A、B重合),连接CO并延长CO交⊙O于点D,连接AD.
![](https://img.xkw.com/dksih/QBM/2015/11/18/1573929820995584/1573929826508800/STEM/d74d187a-387f-4757-9bc2-1dd06824e99b.png)
(1)弦长AB等于________(结果保留根号);
(2)当∠D=20°时,求∠BOD的度数.
![](https://img.xkw.com/dksih/QBM/2015/11/18/1573929820995584/1573929826508800/STEM/d74d187a-387f-4757-9bc2-1dd06824e99b.png)
(1)弦长AB等于________(结果保留根号);
(2)当∠D=20°时,求∠BOD的度数.
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,以AB为直径的⊙O过点D,交CD于点E,
,分别延长AE和BC,相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/dbab7141-caec-45a7-9678-33f1c6277efd.png?resizew=201)
(1)求证:
.
(2)若
,求⊙O的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5671fb9c0a47c55b7f5d544b355ce6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/dbab7141-caec-45a7-9678-33f1c6277efd.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c9ea68cd9659d200587026b9c6ac4c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,以
为直径的
分别交
于点D,交
于点E,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/abf1a2b3-35f7-430f-94e4-6d93a95d2cd4.png?resizew=143)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262a173a7cf68e06b4be175df69e2b74.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83cb6327dcbc8a998e6586bcfa7a3b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是四边形
的外接圆,
是
的直径,
,交
的延长线于点
,
平分
.
(1)求证:
是
的切线.
(2)若
,
,求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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(1)求证:
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在
中,
.动点D从点A出发沿着射线
的方向以每秒1cm的速度移动,动点E从点B出发沿着射线
的方向以每秒2cm的速度移动.已知点D和点E同时出发,设它们运动的时间为t秒.连接
.当
时,求
的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,
的三个顶点在平面直角坐标系中正方形的格点上.
(1)求
的值;
(2)点
在反比例函数
的图象上,求
的值,画出反比例函数在第一象限内的图象.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/0e1398af-705c-4342-8ad8-ec4a76b4f14a.png?resizew=159)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1282cc43ebf4b459832fec04d805989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次