如图,
为
的直径,
、
为
上两点,且点
为
的中点,过点
作
的垂线,交
的延长线于点
,交
的延长线于点
.
(1)求证:
是
的切线;
(2)当
,
时,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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/129baba55117e8d5523746888024273a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/6/f3f8c151-b634-449c-b6cc-534a8dd11928.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8f35a882f2847ab533008caf126d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
19-20九年级上·江苏无锡·期末 查看更多[2]
更新时间:2020-02-05 18:40:11
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,线段
是
的直径,点
为
上一点,
于点
,交
于点
与
交于点
,点
为
的延长线上一点,且
.
(1)求证:
是
的切线;
(2)求证:
;
(3)若
的半径为5,
,求
的值.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f4a6920a0dc269d5d1781e87fe84f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f3700c45a84b02f153ea0fb20b4bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136e8234689ae625e87b38d776926430.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/28/d2bd14fd-53b1-444b-bf5d-583083dc5de8.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5184a74de3d3dca3a2a9bcc7fb99bd06.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ff13b4da65c7da3d898ba58e967b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59475dcca2ebca9831aeb6b1bff08cdf.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是⊙O的直径,点C、D在⊙O上,点E在⊙O外,∠EAC=∠D=60°.
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316955496701952/2318305451147264/STEM/765baff7cc82485da349185a9aeabd4e.png?resizew=181)
(1)求证:AE是⊙O的切线;
(2) 连接OC,当BC=3时,求劣弧AC的长和扇形B0C的面积.
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316955496701952/2318305451147264/STEM/765baff7cc82485da349185a9aeabd4e.png?resizew=181)
(1)求证:AE是⊙O的切线;
(2) 连接OC,当BC=3时,求劣弧AC的长和扇形B0C的面积.
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,直线
过点
,过点A作x轴的垂线,垂足为点B,过点A作y轴的垂线,垂足为点C.
,
于点D.动点P从点O出发,以每秒2个单位长度的速度向点A运动,动点Q从点A出发.以每秒
个单位长度的速度向点B运动.点P,Q同时开始运动,当点P到达点A时,点P,Q同时停止运动,设运动时间为
,且
.
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621717454282752/2623998511054848/STEM/d8f29963d2624498b0ff51ab802a29a8.png?resizew=157)
(1)求m与k的值;
(2)当点P运动到点D时,求t的值;
(3)连接DQ,点E为DQ的中点,连接PE,当
时,请直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f31219f5d2b65fd6060bc9ad2dada66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affbe2d2ced2303d8c3d183746d0bcf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621717454282752/2623998511054848/STEM/d8f29963d2624498b0ff51ab802a29a8.png?resizew=157)
(1)求m与k的值;
(2)当点P运动到点D时,求t的值;
(3)连接DQ,点E为DQ的中点,连接PE,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67566d4e62ee856c685b4fb5c315d2f7.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,等边三角形
的边长为6.
![](https://img.xkw.com/dksih/QBM/2019/7/8/2242458015719424/2242606021246976/STEM/7c9cd4219ffc487b96717fb82e6fc515.png?resizew=135)
(1)点
、
分别在
、
边上,并且
,连结
、
相交于点
.
①求证:
,并求
的度数;
②若
,试求
的值.
(2)当点
从点
沿
运动到点
,点
从点
沿
运动到点
,且
时,若
与
相交于点
,试求点
经过的路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2019/7/8/2242458015719424/2242606021246976/STEM/7c9cd4219ffc487b96717fb82e6fc515.png?resizew=135)
(1)点
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e444739e269a94733b2b0598b559313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f90006a481ba2d548f8eeaf983d4932.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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