如图,在△ABC中,以BC为直径的⊙O交AB于M,弦MN∥AC且MN交BC于点E,ME=1,BM=2,BE=
.
![](https://img.xkw.com/dksih/QBM/2016/9/21/1574236425535488/1574236431278080/STEM/82004aedc7844ddea1b891f7e0055ca8.png)
(1)求证AC是⊙O的切线;
(2)求弧NC的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2016/9/21/1574236425535488/1574236431278080/STEM/82004aedc7844ddea1b891f7e0055ca8.png)
(1)求证AC是⊙O的切线;
(2)求弧NC的长度.
更新时间:2016-12-06 13:35:07
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】已知,如图,在
中,
,
为
边中点.
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291655270400/2493478681444352/STEM/725537ee4db24008b0dafaf4a99bb9a5.png?resizew=187)
(1)尺规作图:以
为直径作
,交
于点
(保留作图痕迹,不需写作法);
(2)连结
,求证:
为
的切线;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291655270400/2493478681444352/STEM/725537ee4db24008b0dafaf4a99bb9a5.png?resizew=187)
(1)尺规作图:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979d5406af7e951f386dbb55a9617eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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
的外接圆,点
在
延长线上,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/51f6e48d-33c7-4979-b8d3-fa71dfc7da3c.png?resizew=222)
(1)求证:
是⊙
的切线;
(2)若
是
的平分线,
,
,求⊙
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f882015c2d5916210b4ebafffd4b2a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/51f6e48d-33c7-4979-b8d3-fa71dfc7da3c.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若
![](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/f6beb17d468d0e90f9c08a8dbbc05541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,
是正五边形
的外接圆,
的半径为
,点
在
上(点
不与点A,B重合).
(1)直接写出
的度数__________;
(2)连接
,
,得到扇形
,将扇形
围成一个圆锥,求该圆锥的底面圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/852b97b2-b1cd-4724-968e-92163bb37a2c.png?resizew=168)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(2)连接
![](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/fa16146cb21f11693feffb0876c0795b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa16146cb21f11693feffb0876c0795b.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐2】(2011内蒙古赤峰,22,12分)如图,等圆⊙
和⊙
相交于A、B两点,⊙![](https://img.xkw.com/dksih/QBM/2011/8/15/1573241967042560/1573242029301760/STEM/74a1cd935e874994b4bcf6bf292d0a70.png)
(1)求证:BM是⊙
的切线;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://img.xkw.com/dksih/QBM/2011/8/15/1573241967042560/1573242029301760/STEM/74a1cd935e874994b4bcf6bf292d0a70.png)
(1)求证:BM是⊙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49702f4d31c6a9bc64ece6f7a46d249.png)
![](https://img.xkw.com/dksih/QBM/2011/8/15/1573241967042560/1573242029301760/STEM/8604bd1bc26f48409b982583f9ac2907.png)
您最近一年使用:0次