如图,在
中,
,
交
于点
,
是
的切线,交
的延长线于点
,
交
于点
,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/19d3a25a-d78b-463d-b151-6b5f55fc27f6.png?resizew=242)
(1)求证:
.
(2)设
度,
度,求
,
之间的数量关系.
(3)若
,且
平行
的一边时,求出所有满足条件的
的长.
(4)若
,直接写出此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc6acc2e933101a028091cf0b2500a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/19d3a25a-d78b-463d-b151-6b5f55fc27f6.png?resizew=242)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39734d148614707445a747e68c5400a4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f8deb2256b4da1445c92d0c37c1768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872600b0fa7820fb97f2d75fc0878c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466d03bc916a9169eaf39863d59fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7031f15a9909366f23784acbab02cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdfe2c723df9614ffb98b2050c6f8b7.png)
20-21九年级下·浙江·期末 查看更多[1]
(已下线)【新东方】【2021.5.20】【WZ】【初三下】【初中数学】【WZ00151】
更新时间:2021-06-01 23:13:22
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】AB是⊙O的直径,弦CD⊥AB于点E,连接AC,过点D作DF
AC交⊙O于点F,连接AF,CF,过点A作AG⊥DF延长线于点G.
(1)求证:CA=CF.
(2)若tan∠ACF=
,CF﹣GF=9,求△ACF的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(1)求证:CA=CF.
(2)若tan∠ACF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐2】已知:如图,⊙O是△ABC的外接圆,AB为⊙O的直径,弦CD交AB于E,
∠BCD=∠BAC .
(1)求证:AC=AD;
(2)过点C作直线CF,交AB的延长线于点F,若∠BCF=30°,则结论“CF一定是⊙O的切线”是否正确?若正确,请证明;若不正确,请举反例.
∠BCD=∠BAC .
(1)求证:AC=AD;
(2)过点C作直线CF,交AB的延长线于点F,若∠BCF=30°,则结论“CF一定是⊙O的切线”是否正确?若正确,请证明;若不正确,请举反例.
![](https://img.xkw.com/dksih/QBM/2012/8/1/1573474449620992/1573474480488448/STEM/b495edce65a047aaac6b5ddf83514247.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,在
中,
,点
是
的中点,以
为直径作
,分别与
,
交于点
,
,过点
作
的切线
交
于点
.
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987260553027584/2993296663363584/STEM/8101a1cc-328d-4299-8ffd-1ae742fd0e71.png?resizew=264)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987260553027584/2993296663363584/STEM/8101a1cc-328d-4299-8ffd-1ae742fd0e71.png?resizew=264)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495be6a6b940e8affe38f2bcdee246b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f20c0125350eefaaa203a7ea5e6759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐2】如图,点
在以
为直径的
上,
平分
交
于点
,交
于点
,过点
作
的切线交
的延长线于点
.
;
(2)若
,
,求
的长.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/e5a122e25cf4eb9f03ffe5ec823bfc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10877fb14700180946ed9b47829ce403.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025df2a9934b457cf20d91604e430612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,一次函数
(
,
为常数,
)的图象与
轴,
轴分别交于
,
两点,且与反比例函数
(
为常数且
)的图象在第二象限交于点
,
轴,垂足为
,若
.
(1)求一次函数与反比例函数的表达式.
(2)求两个函数图象的另一个交点
的坐标.
(3)请观察图像,直接写出不等式
的解集.
(4)点
、
分别为
轴和双曲线上的动点,若以点
、
、
、
为顶点的四边形为平行四边形,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2634263d383b0487281fdcf6fe3cc625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d99f4b7248c760494d7a599a4b92539.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/66e87e7e-0668-4c8c-88bf-b24262879043.png?resizew=150)
(1)求一次函数与反比例函数的表达式.
(2)求两个函数图象的另一个交点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)请观察图像,直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772833ef085e12b5fccde3d505c1122b.png)
(4)点
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】
为
内一点,过
点作
,
,
分别平行于
,
,
(如图所示).
求证:
;
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6df546f4859c2e8e8aa4e547f2474e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427454904bdc0bc0761d56da9d8024f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc08a45be60b256252d0c94b2e457b6.png)
![](https://img.xkw.com/dksih/QBM/2018/10/26/2061915466031104/2062556095987712/STEM/d39cd275eb2f40608e1a342776548944.png?resizew=116)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知锐角三角形ABC内接于⊙O(AB>AC),AD⊥BC于点D,BE⊥AC于点E,AD、AE交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/34a41395-4983-4ed1-a7fb-52f7db7074db.png?resizew=275)
(1)如图1,若⊙O直径为10,AC=8,求BF的长;
(2)如图2,连接OA,若OA=FA,AC=BF,求∠OAD的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/34a41395-4983-4ed1-a7fb-52f7db7074db.png?resizew=275)
(1)如图1,若⊙O直径为10,AC=8,求BF的长;
(2)如图2,连接OA,若OA=FA,AC=BF,求∠OAD的大小.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】(1)如图1.△ABC中,∠C为直角,AC=6,BC=8,D,E两点分别从B,A开始同时出发,分别沿线段BC,AC向C点匀速运动,到C点后停止,他们的速度都为每秒1个单位,请问D点出发2秒后,△CDE的面积为多少?
(2)如图2,将(1)中的条件“∠C为直角”改为∠C为钝角,其他条件不变,请问是否仍然存在某一时刻,使得△CDE的面积为△ABC面积的一半?若存在,请求出这一时刻,若不存在,请说明理由.
(2)如图2,将(1)中的条件“∠C为直角”改为∠C为钝角,其他条件不变,请问是否仍然存在某一时刻,使得△CDE的面积为△ABC面积的一半?若存在,请求出这一时刻,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/8/9/2006928837033984/2007679047434240/STEM/2daded919b374428b9238529addeb092.png?resizew=323)
您最近一年使用:0次