如图,△ABC是⊙O的内接三角形,直径AD=8,∠ABC=∠DAC.
![](https://img.xkw.com/dksih/QBM/2015/3/5/1573807705292800/1573807711715328/STEM/12c3fea4adaf481b8a95819013b6afc2.png)
(1)求AC的长;
(2)求图中阴影部分的面积(结果保留π).
![](https://img.xkw.com/dksih/QBM/2015/3/5/1573807705292800/1573807711715328/STEM/12c3fea4adaf481b8a95819013b6afc2.png)
(1)求AC的长;
(2)求图中阴影部分的面积(结果保留π).
更新时间:2016-12-05 23:02:53
|
【知识点】 圆
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,点P是正方形
内一动点,满足
且
,过点D作
交
的延长线于点E.
![](https://img.xkw.com/dksih/QBM/2022/5/25/2986921767010304/2988849022418944/STEM/d217a71e-7b9f-4915-96b2-2828eebd9c66.png?resizew=164)
(1)依题意补全图形;
(2)用等式表示线段
之间的数量关系,并证明;
(3)连接
,若
,请直接写出线段
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ac2c358c6a25becaa572696b6f83bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a82abf041a3135fc1eb413d669a0e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2986921767010304/2988849022418944/STEM/d217a71e-7b9f-4915-96b2-2828eebd9c66.png?resizew=164)
(1)依题意补全图形;
(2)用等式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18dec790df5916ac40c673445eb2e2bf.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.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
的直径,
,
是
的弦,过圆心
作
的平行线
与过点
的切线交于点
,与
交于点
.
是
的切线;
(2)如果
,
,求
的长;
(3)在(2)的条件下,求图中阴影部分的面积.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bfee689421bd1842e4c559e2c6fea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78691dacfa00dd2448b1ba94b264ec8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)在(2)的条件下,求图中阴影部分的面积.
您最近一年使用:0次