如图,在正方形
中,以A为圆心,作半径为4的圆心角是
的弧,且这条弧恰好经过B、D两点.
的一条切线与
分别交于M、N.求图中阴影部分面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6612c697aa43a72115e5dce1106c0557.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/00c64754-ac67-4d89-97c7-e902a76765ed.png?resizew=188)
更新时间:2023-03-29 09:27:29
|
相似题推荐
解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】在
中,
,点
是直线
上一点,
,垂足为点
于点
,点
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610527237758976/2611905785905152/STEM/0db93452c81a45909b4a806749d0231b.png?resizew=123)
(1)如图1,如果
,且
在
边上,设
交
于点
,且
为
的中点,若
_________.
(2)如图2,如果
,且
在
边上,求证:
.
(3)如图3,如果
,且
在
的延长线上,
,请探究线段
之间的数量关系,并写出证明过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f2c48ec235694a8514517ea19b8cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96c51b170cf1637457b0d5236fd759f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610527237758976/2611905785905152/STEM/311c67c6200e421d8aa2ae4b8c35712e.png?resizew=159)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610527237758976/2611905785905152/STEM/fc787b3993584caf8853b1858f7d7cf8.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610527237758976/2611905785905152/STEM/0db93452c81a45909b4a806749d0231b.png?resizew=123)
(1)如图1,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb6fd2fa53b92a03d21f208b74e3857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030e715bb10167189eb6fc91c0d25a99.png)
(2)如图2,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a355958abf7dc0f2eb949584cb87907b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42114784648f39b5dcb0eaa371aec4a.png)
(3)如图3,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d846d488fdef957b911bb295935852f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7b9d24a1685a636e92f5ae3d791b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fae050b733c5952e4dac7fb16b1839e.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】如图,点
、
、
、
是
上的四个点,
是
的直径,
,过点
的直线与
的延长线、
的延长线分别相交于点
、
,且
.
(1)求证:
是
的切线;
(2)若
的半径为5,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/3d97cdc586744d208b6f69c9813af977.png)
![](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/d047dafd76f044963ac53080f82122de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34323137ddb894a70d97511aa5fe6f98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/1fc7b489-b4e7-49b6-805e-ffbbbd5211b9.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
【推荐3】定义:若一个四边形的对角线互相垂直,且较长对角线的长度是较短对角线长度的2倍,则称这个四边形为“倍垂四边形”.
(1)如图①,在菱形
中,对角线
与
相交于点O,
,试判断菱形
是否为“倍垂四边形”,并说明理由;
(2)如图②,在
中,
,作
于点O,问在射线
上是否存在着一点D,使得四边形
是“倍垂四边形”.若存在,请求出此时线段
的长;若不存在,请说明理由;
![](https://img.xkw.com/dksih/QBM/2020/10/14/2570713856196608/2571063152754688/STEM/70b9f2fc-6afa-49ab-aafe-757cb6701a2f.png)
(3)如图③,在
中,
,且
,分别以
的斜边
和直角边
为边向外作
和
,且
,连接
,当四边形
是“倍垂四边形”时,求
的长.
(1)如图①,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e97845c5fc581f5d6cf9587c8c436a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/10/14/2570713856196608/2571063152754688/STEM/96efbeb0-ef43-4c20-86c6-e6b6e4aeaba6.png?resizew=279)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc133218f98e5baf7202cc539f72b831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bb2d945b7908ebac080e6595d4895f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://img.xkw.com/dksih/QBM/2020/10/14/2570713856196608/2571063152754688/STEM/70b9f2fc-6afa-49ab-aafe-757cb6701a2f.png)
(3)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b1e553682cbaade9d484445b786b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41225b0c6ff901aef01d5094310b82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9681f9d187e18d23f604499a23727daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269e4ef28ffa27e881cf7f750194a560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2020/10/14/2570713856196608/2571063152754688/STEM/1ea828b5-6f3d-47d0-8446-897285d9e11f.png)
您最近一年使用:0次
【推荐1】已知如图,这正方形ABCD中,AB=4,M是边AD的中点,E是边AB上的一个动点,GM⊥EM交边DC于点P,交边BC的延长线于点G,延长EM交边CD的延长线与F,连接FG
(1)求证:△AME∽△CPG;
(2)设A,E两点的距离为x,△CFG的面积为y,求x,y之间的函数关系式及定义域;
(3)当△PFG时等腰三角形时,求AE的长.
(1)求证:△AME∽△CPG;
(2)设A,E两点的距离为x,△CFG的面积为y,求x,y之间的函数关系式及定义域;
(3)当△PFG时等腰三角形时,求AE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/c3500f68-7a2c-4b01-92c2-184299713996.png?resizew=184)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图,在正方形ABCD中,对角线AC,BD相交于点O,点E在BC边上,且CE=2BE,连接AE交BD于点G,过点B作BF⊥AE于点F,连接OF并延长,交BC于点M,过点O作OP⊥OF交DC于点N,S四边形MONC=
.
(1)求正方形ABCD的面积;
(2)求
;
(3)求OF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8021a1bd479b25e0604bc7261fcabdbe.png)
(1)求正方形ABCD的面积;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731387911aca1fa8e5e9f51683fbb23d.png)
(3)求OF.
![](https://img.xkw.com/dksih/QBM/2020/12/31/2625993403219968/2630104471478272/STEM/3e21fa7d-365d-4d37-818f-d2abe96ac422.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐1】(1)【操作】如图,请用尺规作图确定圆的圆心
,保留作图痕迹,不要求写作法;
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720912379928576/2722986354827264/STEM/84582dc9-9ddd-4659-9878-3fb5eaa3af04.png)
(2)【探究】如图,若(1)中的圆
的半径为2,放入平面直角坐标系中,使它与
轴,
轴分别切于点
和
,点
的坐标为
,过点
的直线与圆
有唯一公共点
(与
不重合)时,求点
的坐标;
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720912379928576/2722986354827264/STEM/3a136419-8506-432d-824c-efff11fa29c1.png)
(3)【拓展】如图3,点
从点
出发,以每秒1个单位的速度沿
轴向点
运动,同时,点
从原点
出发,以每秒1个单位的速度沿
轴向上运动,设运动时间为
(
),过点
,
,
三点的圆,交第一象限角平分线
于点
,当
为何值时,
有最小值,求出此时
,并探索在变化过程中
的值有变化吗?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720912379928576/2722986354827264/STEM/84582dc9-9ddd-4659-9878-3fb5eaa3af04.png)
(2)【探究】如图,若(1)中的圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7dbb4d8de32b258d813996710d6241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720912379928576/2722986354827264/STEM/3a136419-8506-432d-824c-efff11fa29c1.png)
(3)【拓展】如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ba33de35567ff6f8c15e7e0d37aa590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eba09e0a67e72539685987d5761f409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4e71d2b09fb52643de6c2ee0105996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4e71d2b09fb52643de6c2ee0105996.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720912379928576/2722986354827264/STEM/a4df5c1d-e752-4545-a3f7-3571849148f4.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,半径为1的
在矩形
的内部,将圆周12等分,过各等分点作圆的切线,在第一条切线上量取
,
为图的周长,在第二条切线上量取
,在第三条切线上量取
,在第四条切线上量取
,依此类推,将
,
,
,
用光滑的曲线连结,若此时
于
,
于
,
所在直线恰好经过点
,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2eac387636cb6acc92331412a59802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f7f967b3fadf08870aad794cffd5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e539a68df43c472f2fa7326a1d7cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f094079b6751b24c085c6e92dd06ee83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c09719d689339d8ffbcff33d7b9054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ffb31f3a51c51bf87e07ba58e050c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56068a495476a986c794afbcb5e1a4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63be95225b55df87368caaf221adf29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe06c5d567bb0157a277aea719d2a525.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480e34cd73a8cc44f95ad4f77675f771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47d9f755ee735c29e0d9f9914428f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】问题提出
(1)如图1,
的半径为
,弦
,
是弦
所对的优弧
上的一个动点,求图中阴影部分的面积之和的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/8414b96c-fbf1-4172-9f8a-e8fbaf1c9169.png?resizew=142)
问题解决
(2)如图2,这是某市的一个面积为
的圆形宾馆示意图.点
为圆心,宾馆设计图纸中有一个四边形区域
,连接
,其中等边
为接待区域,
为休息区域,当点
在
的什么位置上时,四边形区域
的面积最大?并求出最大值.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff65ab4ec507ada90acb8755fbd189c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/8414b96c-fbf1-4172-9f8a-e8fbaf1c9169.png?resizew=142)
问题解决
(2)如图2,这是某市的一个面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565073e1f31f6a4511bf166601f73d9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd38e0d42026b953b2fd2ad3634ecb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/6531e909-d0b5-4998-93e5-8a3e0de43626.png?resizew=146)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,在
中,点A是边BE上一点,以AB为直径的
与CE相切于点D,
,点F为OC与
的交点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/a9d41faf-5a08-45d6-8ff0-a72be83c3c8c.png?resizew=186)
(1)求证:CB是
的切线;
(2)连接DB与OC交于点G,
,
,求阴影部分面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9204fa555e4c2945323c6c49116ccfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/a9d41faf-5a08-45d6-8ff0-a72be83c3c8c.png?resizew=186)
(1)求证:CB是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接DB与OC交于点G,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d48852ad433b0da21abf5be0f79260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fb9a3d61c62c86cde849e519e6bb8c.png)
您最近一年使用:0次