如图,在
中,
,延长
到点D,以
为直径作
,交
的延长线于点E,延长
到点F,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/41a172bd-d306-4af1-a30f-88369ff3b0d7.png?resizew=113)
(1)求证:
是
的切线;
(2)若
的半径为
,
,求
的长.
(3)在(2)的条件下,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.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/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193ea44749f1c64c8723e84a57d15cb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/41a172bd-d306-4af1-a30f-88369ff3b0d7.png?resizew=113)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe6b4186fb05f40e8151b6ab8474a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
更新时间:2023-12-20 16:15:54
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
为
的直径,
为圆上一点,
.
为
的切线;
(2)若
,
,
,求
的长.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea115e3cd939ece96569007c532e83ab.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/0f7dd285b3a7682aa5c527e422c5d68f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe387a6c40b0012fc3d0fe1a55e023f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4346641491fc90d125ebbd06343382a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】(1)计算:
.
(2)如图,在
中,
,点
是
的中点,在
的延长线上取点
,使
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c5f70e48c6c0edcd4236e7bc9fca62.png)
(2)如图,在
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f5434406acfefc5690608f18a7e02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/2910dd38-972f-4f84-991c-80e7a2847646.png?resizew=158)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,已知
中,
, 以点B为圆心,任意长为半径画弧,分别交
于点M,N,再分别以M,N为圆心,大于
的长为半径画弧,两弧交于点P,连接
并延长,交
于点O,以O为圆心,
为半径作
.
为
的切线;
(2)射线
与
交于点D,E,连接
,若
,求
的半径和
的长;
(3)当
______时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674c703e1fee31e92f13ff1923917759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.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/3d97cdc586744d208b6f69c9813af977.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2a6c7ca1e46daf9a8b9e163f1255d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885fda880a4937cc12bdcdf84effb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b83764876be47a196fd5f408763738a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28971fe3e3f9d3849400e98b46fc3ba.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,正方形ABCD中,点E是CD边上一点,连结BE,以BE为对角线作正方形BGEF,边EF与正方形ABCD的对角线BD相交于点H,连结AF,CG.
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913282453028864/2965425450033152/STEM/cf10346c-a62d-4a10-9b71-f8fd2bc5e596.png?resizew=166)
(1)直接写出AF和CG的数量关系______,位置关系______.
(2)求证:DE=
AF,AF⊥BD.
(3)若正方形ABCD和正方形BGEF的边长分别为6和4
,直接写出BH的长.
(4)若EC=3,BC=4,直接写出CF和CG的长.
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913282453028864/2965425450033152/STEM/cf10346c-a62d-4a10-9b71-f8fd2bc5e596.png?resizew=166)
(1)直接写出AF和CG的数量关系______,位置关系______.
(2)求证:DE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)若正方形ABCD和正方形BGEF的边长分别为6和4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(4)若EC=3,BC=4,直接写出CF和CG的长.
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,C为
上一点,连接
,
.
平分
,点D在
上,连接
,交
于点E.
(1)若
,
,求
的长;
(2)求证:
.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/25/f9061fd2-d2e5-450a-899f-ab5fba70118e.png?resizew=169)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099583a660c8ce79be1698d534db6f7c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】用反证法证明:在同一圆中,如果两条弦不等,那么它们的弦心距(圆心到弦的距离)也不等.已知:
中
和
是它的两条弦,
垂足为
,
垂足为
,
.求证:
.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd6ec8fa1147280a0eaba74744b2d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5385b423da4a4f9f48f07c439465968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9e5df1deb0777794ec0c8d44571409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941a01763cf791aa036dc7e42a0c02b1.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】如图,P为
外一点,M为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/f622f4bf-80b5-4d5a-ad37-a2ad57350b78.png?resizew=236)
(1)过点P作
的一条切线
,且Q为切点(尺规作图,保留作图痕迹,不写作法);
(2)在(1)的条件下,若
,求证:点M在
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/f622f4bf-80b5-4d5a-ad37-a2ad57350b78.png?resizew=236)
(1)过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a07a2985e8492370f87d013c318fbc.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,以正方形ABCD的边AB为直径作⊙O,E是⊙O上的一点,EF⊥AB于F,AF>BF,作直线DE交BC于点G.若正方形的边长为10,E
F=4.
(1)分别求AF、BF的长.
(2)求证:DG是⊙O的切线.
![](https://img.xkw.com/dksih/QBM/2018/9/4/2024977915682816/2026056709087233/STEM/9ab380037c9345839e555ba5fbb76e37.png?resizew=5)
(1)分别求AF、BF的长.
(2)求证:DG是⊙O的切线.
![](https://img.xkw.com/dksih/QBM/2018/9/4/2024977915682816/2026056709087233/STEM/bf1bfc1a73e94333938f0d2cce5771dc.png?resizew=214)
您最近一年使用:0次