探究式学习是新课程倡导的重要学习方式,某兴趣小组拟做以下探究.
如图1,等腰
中,
,以
为直径的
与
所在直线、
分别交于点
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/efec3f70-936e-46df-912d-9441bfa99b80.png?resizew=299)
【初步感知】(1)求证:
为
的切线;
【深入研究】(2)当
时,若
,求
的长.
【拓展延伸】(3)如图2,当
时,若
,求
的长.
如图1,等腰
![](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/60ef95894ceebaf236170e8832dcf7e3.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e4b205e6f05e38c12b510b841b6a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/efec3f70-936e-46df-912d-9441bfa99b80.png?resizew=299)
【初步感知】(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
【深入研究】(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f5d00d8fe56bf189591a7afa4bb811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60eb2b8fbf9e805f8bde2ae96b350aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
【拓展延伸】(3)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29edec1f0ccd57a096fa9ef344d23568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628ca464d6d1af19ffe719759667bf93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
更新时间:2024-03-15 19:10:36
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在△ABC中,AB=AC,点D、E、F分别在AB、BC、AC边上,且BE=CF,BD=CE.
![](https://img.xkw.com/dksih/QBM/2019/12/9/2351431168368640/2352157898276864/STEM/52bfc798bad24364ace5cee4a47fc297.png?resizew=157)
(1)求证:△DEF是等腰三角形;
(2)当∠A=36°时,求∠DEF的度数.
![](https://img.xkw.com/dksih/QBM/2019/12/9/2351431168368640/2352157898276864/STEM/52bfc798bad24364ace5cee4a47fc297.png?resizew=157)
(1)求证:△DEF是等腰三角形;
(2)当∠A=36°时,求∠DEF的度数.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,直线
分别于x轴,y轴相交于点A、B,将
绕点A顺时针旋转,使
落在
上,得到
,将
沿射线
平移,当点D到达x轴时运动停止.设平移的距离为m.平移后的图形在x轴下方部分的面积是S.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/00a7526e-dc90-4328-acea-01875d37ec34.png?resizew=355)
(1)点A的坐标为__________,点B的坐标为_______
(2)求S关于m的函数解析式,并直接写出自变量的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bdbaee1c6d92b27ceac6e066cfce36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/00a7526e-dc90-4328-acea-01875d37ec34.png?resizew=355)
(1)点A的坐标为__________,点B的坐标为_______
(2)求S关于m的函数解析式,并直接写出自变量的取值范围.
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O在AB上,以O为圆心,OA长为半径的圆与AC、AB分别交于点D、E,且
.
(1)判断直线
与
的位置关系,并证明你的结论;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940699bc6596266f000d99efff2954d4.png)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5d67ad2d01d7e42742565e0e494db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730688590569472/2730993742135296/STEM/bdc020ba-4ee1-4433-bc06-f6a9d720392a.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】已知:
和圆外一点P,求作:过点P的
的切线.
作法:①连接
;
②分别以O,P为圆心,大于
长为半径画弧,两弧交于M,N两点,连接
,交
于点C.
③以C为圆心,
长为半径作
,交
于点A,B;
④作直线
.
所以直线
为
的切线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/4af8fdac-eb71-43c3-9c9e-289b37073e9b.png?resizew=174)
(1)使用直尺和圆规,依作法补全图形(保留作图痕迹);
(2)完成下面的证明.
证明:连接
,
.
∵
,
,
∴MN是线段OP的垂直平分线(__________)(填推理的依据).
∴
.
∵OP为
的直径,A,B在
上
∴
(__________)(填推理的依据).
∴半径
,半径
.
∴直线
,
为
的切线(__________)(填推理的依据).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
作法:①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
②分别以O,P为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64dc1ab9bf65cfdaac7633e9a7958ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
③以C为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
④作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e58e5a299e7b6b508c61244b93ae1a.png)
所以直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e58e5a299e7b6b508c61244b93ae1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/4af8fdac-eb71-43c3-9c9e-289b37073e9b.png?resizew=174)
(1)使用直尺和圆规,依作法补全图形(保留作图痕迹);
(2)完成下面的证明.
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296878aeb590f62c384c90de3110b9cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5930aa43b80acf244017090442469b1b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccebeed9252beaea560ab6697cacd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212b4f502299f95b58bde72ad9b59023.png)
∴MN是线段OP的垂直平分线(__________)(填推理的依据).
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58a10b21bad491e2a4851f14c12a681.png)
∵OP为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655e376555ccc82ccd72aac59d3949da.png)
∴半径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f4e3d790f0c9470caa52afa455aca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85be38645f49e81c1c754f22ceb10c3.png)
∴直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.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1】如图,在平行四边形ABCD中,过点A作AE⊥BC,垂足为E,连接DE,F为线段DE上一点,且∠AFE=∠B.
![](https://img.xkw.com/dksih/QBM/2015/7/6/1573863944593408/1573863950565376/STEM/c267868394484dfaa52e748ee55a9123.png)
(1)求证:DF·DE=CE·CB;
(2)若AB=4,AD=3
,AE=3,求AF的长.
![](https://img.xkw.com/dksih/QBM/2015/7/6/1573863944593408/1573863950565376/STEM/c267868394484dfaa52e748ee55a9123.png)
(1)求证:DF·DE=CE·CB;
(2)若AB=4,AD=3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
中,
,
.点
是
的中点,连接
,过点
作
,分别交
,
于点
,
,与过点A且垂直于
的直线相交于点
,连接
.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/16430aed-f13f-49dd-9acd-de82b5a1915d.png?resizew=147)
(1)
的长;
(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d121aa5eddc1b0af04c4810e44c8f1.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54772dd379d3c6c1a1c4f0f00690ced6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/16430aed-f13f-49dd-9acd-de82b5a1915d.png?resizew=147)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aee9f5255f3082852d046ba1b011c23.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,四边形
内接于
,
,
是对角线,点
在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968534751428608/2974211151503360/STEM/4ff87f42-9e04-4c8e-a33a-0f1765b3ac9e.png?resizew=215)
(1)求证:
是
的切线;
(2)
与
的延长线交于点
,若
,
,
,求证:
;
(3)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7f14a84f82f14387a86f679aa69c48.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968534751428608/2974211151503360/STEM/4ff87f42-9e04-4c8e-a33a-0f1765b3ac9e.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7611391918a3aec67fe832b38225891a.png)
(3)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)
名校
【推荐2】如图,
是
的直径,点C在
上,D为
外一点,且
,
.
![](https://img.xkw.com/dksih/QBM/2021/12/12/2870785371824128/2871636458176512/STEM/4ce1c446-04af-4f53-9c6e-81ce72c200d3.png?resizew=194)
(1)求证:直线
为
的切线.
(2)若DC=
,AD=2,求⊙P的半径.
(3)在(2)的条件下,求阴影部分的面积.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4f81f421cb99e073a14f1ff742e017.png)
![](https://img.xkw.com/dksih/QBM/2021/12/12/2870785371824128/2871636458176512/STEM/4ce1c446-04af-4f53-9c6e-81ce72c200d3.png?resizew=194)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若DC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(3)在(2)的条件下,求阴影部分的面积.
您最近一年使用:0次