如图,AB是⊙O的直径,AC是⊙O的切线,切点为A,BC交⊙O于点D,点E是AC的中点.
(1)试判断直线DE与⊙O的位置关系,并说明理由;
(2)若⊙O的半径为2,∠B=50°,AC=6,求图中阴影部分的面积.
(1)试判断直线DE与⊙O的位置关系,并说明理由;
(2)若⊙O的半径为2,∠B=50°,AC=6,求图中阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/62155137-0118-4748-bcdd-c097229c6e6c.png?resizew=169)
19-20九年级下·江苏盐城·阶段练习 查看更多[10]
江苏省盐城市2019-2020学年九年级下学期第一次调研数学试题2020年江苏省阜宁县九年级第一次调研数学试题辽宁省抚顺市望花区2019-2020学年九年级上学期第二次测验数学试题2021年山东省东营市广饶县九校联考中考数学二模试卷2023年辽宁省抚顺市东洲区九年级中考模拟检测(一)数学试题江苏省盐城市东台市第二教育联盟2022-2023学年九年级下学期3月月考数学试题2023年辽宁省葫芦岛市绥中县中考一模数学试题江苏省盐城市东台市东台市五烈镇广山中学等3校2022-2023学年九年级下学期3月月考数学试题湖南省长沙市实验中学2022-2023学年九年级下学期期中考试数学试卷2023年辽宁省沈阳市新民市实验中学中考三模数学试题
更新时间:2020-02-01 13:13:27
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
中,
于D,
,
的角平分线交
于点
.求证:点
恰在
的垂直平分线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89e3e03158b56e714b771115443660d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/d2efb2d2-4f90-4c44-8db3-b7dda09e1992.png?resizew=156)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在等腰
中,
,D、E分别为
上的点,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/80f7fcc1-064b-4bc9-8c28-1ba6ffff9183.png?resizew=121)
(1)求证:
;
(2)连接
,试判断
与
的位置关系,并证明.
![](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/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/80f7fcc1-064b-4bc9-8c28-1ba6ffff9183.png?resizew=121)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f93040d344eade19fd2378d6829b079.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,已知
是
的直径,
过
的中点
,且
.
(1)求证:
是
的切线;
(2)若
,
cm,求
的半径.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640f058b479299659893cf524ddf6544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/4e892e13-4f80-4844-8a29-0588747ebe7f.png?resizew=137)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在四边形ABCD中,E,F分别是边AD,BC的中点,G,H分别是对角线BD,AC的中点,当AB,CD满足什么条件时,有EF⊥GH?请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/79f5379a-3714-4e37-8e9a-1ff7b7ee83bc.png?resizew=181)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在△ABC中,AB=CB,以BC边为直径的⊙O交AC于点E.点D在BA的延长线上,且∠ACD=
ABC.
![](https://img.xkw.com/dksih/QBM/2021/3/5/2671129901940736/2672101889040384/STEM/1e09729c928644269eb126938f7777cf.png?resizew=132)
(1)求证:CD是⊙O的切线;
(2)若∠ACB=60°,BC=12,连接OE,求劣弧
所对扇形BOE的面积(结果保留π).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776ab5dd52110e80b5578f159ada6da9.png)
![](https://img.xkw.com/dksih/QBM/2021/3/5/2671129901940736/2672101889040384/STEM/1e09729c928644269eb126938f7777cf.png?resizew=132)
(1)求证:CD是⊙O的切线;
(2)若∠ACB=60°,BC=12,连接OE,求劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b19c646bcb6160197fdf12a9cb31a0d.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,已知 AB 是⊙O 的直径,点 C、D 在⊙O 上,过 D 点作 PF∥AC交⊙O 于 F,交 AB 于点 E,∠BPF=∠ADC
(1)求证:BP 是⊙O 的切线:
(2)求证:AE•EB=DE•EF.
(3)当的半径为
,AC=2,BE=1 时,求 BP 的长,
(1)求证:BP 是⊙O 的切线:
(2)求证:AE•EB=DE•EF.
(3)当的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096818985189376/2098850384445440/STEM/8f513c01ccc143c2b56d64787eb776d1.png?resizew=123)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,O是
的外接圆,
是
的直径,点D是
延长线上一点,过点D作
,
分别交
的延长线于点E、F,若点E恰是
的中点,连接
.
是
的切线;
(2)若
,
,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](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/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0acf5a480444534374e439fcb5bbe3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.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,已知
是
的直径,点D,C是圆上的两个点,且
,直线
于点E.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712414536654848/2717491178913792/STEM/1fcad71d-93a9-48f2-97d7-83aab3ef34c1.png)
(1)求证:
是
的切线;
(2)若
,求阴影部分的面积.
![](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/5bb12d9cbf4d45e8efc4f53c41e2d932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c230b2139256d8e4a7f964ccc8136d.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712414536654848/2717491178913792/STEM/1fcad71d-93a9-48f2-97d7-83aab3ef34c1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba4a4594e34cd4c62256743a1928977.png)
您最近一年使用:0次