如图,
为半圆
的直径,四边形
为平行四边形,
为
的中点,
平分
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/2e46aabc-39e4-4e58-9627-9663a4e85051.png?resizew=180)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10681704c4fccfd37664eaf34391dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/2e46aabc-39e4-4e58-9627-9663a4e85051.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e1083b773e16d1e385072652f7319.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74d96da89eda4d0b1eceab583e40e47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
更新时间:2023-04-11 16:33:32
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的外接圆,且
,点M是
的中点,作
交
的延长线于点N,连接
交
于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/30e9a222-1207-4c19-9289-a8d556b59c50.png?resizew=212)
(1)求证:
是
的切线;
(2)若
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/3b919608c5146393d1e3a2806da5f0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8fb4b5afd9999b210f1bab1a0854d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/30e9a222-1207-4c19-9289-a8d556b59c50.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b55bd019b2fb4797361678984ad71888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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,AB、AC是⊙O的两条弦,M是
的中点,N是
的中点,弦MN分别交AB、AC于点P、D.
(1)求证:AP=AD;
(2)连接PO,当AP=3,OP=
,⊙O的半径为5,求MP的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
(1)求证:AP=AD;
(2)连接PO,当AP=3,OP=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://img.xkw.com/dksih/QBM/2021/3/23/2684019256492032/2684269430153216/STEM/f7d10474ae7c47a3b5302e9d74e099ed.png?resizew=163)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,点
为
外一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/17cee9d8-6b2c-4af6-8cd9-7c292e0c8580.png?resizew=157)
(1)过点
作
两条切线
、
(尺规作图,保留痕迹,不写作法)
(2)证明:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/17cee9d8-6b2c-4af6-8cd9-7c292e0c8580.png?resizew=157)
(1)过点
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,AB是⊙O直径,点C在⊙O上,AD平分∠CAB,BD是⊙O的切线,AD与BC相交于点E,与⊙O相交于点F,连接BF.
![](https://img.xkw.com/dksih/QBM/2020/4/8/2436881561493504/2437520797900800/STEM/8564d5126a354a5fa9a69f11102dba26.png?resizew=169)
(1)求证:BD=BE;
(2)若DE=2,BD=2
,求AE的长.
![](https://img.xkw.com/dksih/QBM/2020/4/8/2436881561493504/2437520797900800/STEM/8564d5126a354a5fa9a69f11102dba26.png?resizew=169)
(1)求证:BD=BE;
(2)若DE=2,BD=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】某数学社团遇到这样一个题目如图①,在△ABC中,点O在线段BC上,∠BAO=30°,∠OAC=75°,AO=
,BO∶CO=1∶3,求AB的长.经过社团成员讨论发现,如图②,过点B作BD
AC,交AO的延长线于点D,通过构造△ABD 就可以解决问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/2252360e-ced0-4a47-a282-f3d7a1ec74ca.png?resizew=499)
(1)请写出求AB长的过程.
(2)如图③,在四边形ABCD中,对角线AC与BD相交于点O,AC⊥AD,∠ABC=∠ACB=75°,BO∶OD=1∶3.若AO=
,求AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92863f6b0a1aaecf38b68b3c9e26f496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7003aee0b4b85f0fdd48ca9ae5826d54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/2252360e-ced0-4a47-a282-f3d7a1ec74ca.png?resizew=499)
(1)请写出求AB长的过程.
(2)如图③,在四边形ABCD中,对角线AC与BD相交于点O,AC⊥AD,∠ABC=∠ACB=75°,BO∶OD=1∶3.若AO=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92863f6b0a1aaecf38b68b3c9e26f496.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,在等腰△ABC中,AB=BC,∠A=30°,O为线段AC上一点,以O为圆心,线段OC的长为半径画圆恰好经过点B,与AC的另一个交点为D.
(1)求证:AB是圆O的切线;
(2)若⊙O的半径为1,求图中阴影部分的面积.
(1)求证:AB是圆O的切线;
(2)若⊙O的半径为1,求图中阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/2020/12/21/2618709105025024/2623238960300032/STEM/4c37780edc11474db4a6178bb429199b.png?resizew=175)
您最近一年使用:0次