如图,AB是⊙O的直径,点D,E在⊙O上,四边形BDEO是平行四边形,过点D作
交AE的延长线于点C.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892244035198976/2895097634643968/STEM/812f4e94-f02a-40fd-99d5-d992c3d04932.png?resizew=158)
(1)求证:CD是⊙O的切线.
(2)若
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79014991c521a74ba2597e8b23cac2f6.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892244035198976/2895097634643968/STEM/812f4e94-f02a-40fd-99d5-d992c3d04932.png?resizew=158)
(1)求证:CD是⊙O的切线.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348216467fda035329fe8fac46b39911.png)
更新时间:2022-01-15 17:54:07
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,AB是
的弦,过AB的中点E作
,垂足为C,过点B作直线BD交CE的延长线于点D,使得
.
![](https://img.xkw.com/dksih/QBM/2022/3/31/2947979703787520/2967035919876096/STEM/6aec8dae-6c96-4ba6-81c0-a17cafbdc56e.png?resizew=144)
(1)判断BD与
的位置关系,并说明理由;
(2)若
,
,求BD的长;
(3)在(2)的条件下,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab274af3fbc308c9de2dffb8a30a9bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce25e95729c34d26e482512d36dd89b1.png)
![](https://img.xkw.com/dksih/QBM/2022/3/31/2947979703787520/2967035919876096/STEM/6aec8dae-6c96-4ba6-81c0-a17cafbdc56e.png?resizew=144)
(1)判断BD与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee608882881caff2f1e223177424ac.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cc6a0d2f0c5166fd2c9868a85b50ef.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
中,
,
,
.
的平分线
交
于
,经过
、
两点的
交
于
,且点
在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/f90d1f17-edeb-422e-88fe-2cb8c2df23a0.png?resizew=159)
(1)求证:
是
的切线;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348216467fda035329fe8fac46b39911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/5963abe8f421bd99a2aaa94831a951e9.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/f90d1f17-edeb-422e-88fe-2cb8c2df23a0.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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,
是
的直径,
是半圆
上的一点,
平分
,
,垂足为
,
交
于
,连接
.
与
的位置关系,并证明你的结论;
(2)若
,
,求
的长;
(3)若
是弧
的中点,
的半径为
,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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b845c2bc639536a3e1a37b3e381847ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/d91e07104b699c4012be2d26160976a2.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,
的角平分线
交
边于
.以
上某一点
为圆心作
,使
经过点
和点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/9910aace-d161-4871-9ab7-27b0db4daa56.png?resizew=166)
(1)判断直线
与
的位置关系,并说明理由;
(2)若
的半径为2,
.
①求
的长;
②设
与
边的另一个交点为
,求线段
、
与劣弧
所围成的阴影部分的图形面积.(结果保留根号和
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/9910aace-d161-4871-9ab7-27b0db4daa56.png?resizew=166)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/56d3c9ce32b721995f355eea411340e3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
②设
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.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,已知在
中,点D是
边上一点,且
,点E是
边上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/987ab6a5-cb87-4f0f-b909-440195f0e6de.png?resizew=132)
(1)求证:
;
(2)若
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1506cb69ad09a9ef2c8807a47dfcac1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/987ab6a5-cb87-4f0f-b909-440195f0e6de.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cb45d0789ca0270b2696775f4764a0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b0a356dea512850c9a431aed0b7416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8dba2a184a6ff057951e32fc6e8a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdb4e86791f88a6aaa69ce984593829.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,在梯形
中,
,
,且
,
.
(1)求证:
;
(2)E是梯形内一点,F是梯形外一点,且
,当
,
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489883fe8df8ef29f9f3fc123261449e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b3e2a00fb55654c8fd78c34a4ded09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/12/cbd52069-bc60-43a1-9100-502bff2db514.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f213621229843639780aae87fa29584.png)
(2)E是梯形内一点,F是梯形外一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b811daeed80dd5d8c77eb14a8de07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d5ac438743e1086f8bbfe461e4220c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98edef8531283edd45ec598a7a43f4d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1dbb5825244d0c96fd4d0bd1a9b21d0.png)
您最近一年使用:0次