在⊙O中,弦
与直径
相交于点P.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898451414130688/2916480816406528/STEM/355042f8-0ae3-4186-8951-076a2419feb7.png?resizew=166)
(1)若
,
,则
= ;
= ;
(2)若
的度数为m度、
的度数为n度,猜想:∠APD的度数与m、n之间的数量关系,并证明你的结论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898451414130688/2916480816406528/STEM/355042f8-0ae3-4186-8951-076a2419feb7.png?resizew=166)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0722b363551b3bc23b6fc1ebacc6be9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6632eb0ec088b390f2bbd4205c29a2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
更新时间:2022-02-14 22:58:19
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,在△ABC中,AC的垂直平分线交AC于点D,与BC延长线交于点E,连接AE,如果∠B=48°,∠BAC=19°,求∠CAE的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/09aad956-2189-41e3-8ccb-953a456b3bc7.png?resizew=190)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】如图,已知
中,
,
平分
,E是线段
(除去端点A、D)上一动点,
于点F.若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e9019487563439986e1106739c4845.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5ecca2b458eed286f71f52656b17d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/ed5a1b27-a36e-42ef-a224-5c4d3dc6d4ed.png?resizew=166)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐1】已知:如图,△ABC中,
C=90°.
求作:∠CPB=∠A,使得顶点P在AB的垂直平分线上.
作法:①作AB的垂直平分线l,交AB于点O;
②以O为圆心,OA为半径画圆,⊙O与直线l的一个交点为P(点P与点C在AB的两侧);
③连接BP,CP.∠CPB就是所求作的角.
(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OC,
∵l为AB的垂直平分线
∴OA= .
∵∠ACB=90°,
∴OA=OB=OC.
∴点A,B,C都在⊙O上.
又∵点P在⊙O上,
∴∠CPB=∠A( )(填推理依据).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
求作:∠CPB=∠A,使得顶点P在AB的垂直平分线上.
作法:①作AB的垂直平分线l,交AB于点O;
②以O为圆心,OA为半径画圆,⊙O与直线l的一个交点为P(点P与点C在AB的两侧);
③连接BP,CP.∠CPB就是所求作的角.
(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OC,
∵l为AB的垂直平分线
∴OA= .
∵∠ACB=90°,
∴OA=OB=OC.
∴点A,B,C都在⊙O上.
又∵点P在⊙O上,
∴∠CPB=∠A( )(填推理依据).
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643970047385600/2644326254051328/STEM/341d71f558194453a1e1fc884b18b8b2.png?resizew=147)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】如图,点A,B,C在
上,顺次连结
,
,
,且
,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/a6391626-0849-4262-9167-f06680a028de.png?resizew=117)
(1)求
的度数;
(2)若
的半径为3.求
的面积.
![](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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fd93ef75a31a22b8824478ee8ab01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2436bd8d4935f06d8a35b69bea62a725.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/a6391626-0849-4262-9167-f06680a028de.png?resizew=117)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐1】如图
,圆
的两条弦
、
交于点
,两条弦所成的锐角或者直角记为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa1748d2b5c344f9cd292ec63f0a469.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871773094453248/2873039411281920/STEM/c3dd6913-dcbf-45d6-b49d-0106bdd16083.png?resizew=320)
(1)点点同学通过画图和测量得到以下近似数据:
猜想:
、
、
的度数之间的等量关系,并说明理由![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fb6c7c93751fcd8627f1cbf321103a.png)
(2)如图
,若
,
,
,将
以圆心为中心顺时针旋转,直至点
与点
重合,同时
落在圆
上的点
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a15d112b8e21310201cd8d7126a01b0.png)
①求
的的度数;
②求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa1748d2b5c344f9cd292ec63f0a469.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871773094453248/2873039411281920/STEM/c3dd6913-dcbf-45d6-b49d-0106bdd16083.png?resizew=320)
(1)点点同学通过画图和测量得到以下近似数据:
![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa1748d2b5c344f9cd292ec63f0a469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fb6c7c93751fcd8627f1cbf321103a.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef1d6211d36fbb3efb60e6194cbc61b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17c0e8c2d7a6d19e171d6c9aa286de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0c2dba4d672b8db7fb5d519fb3a3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a15d112b8e21310201cd8d7126a01b0.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64254c5dbc7252590f8f8dabe3dbb38c.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
您最近一年使用:0次
解答题-应用题
|
较易
(0.85)
【推荐2】如图,
是
的内接三角形,
是
的直径,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/fadf6ecf-48dd-47dd-8af5-7263a7bcb758.png?resizew=146)
(1)求
的度数.
(2)若
的半径为1,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/fadf6ecf-48dd-47dd-8af5-7263a7bcb758.png?resizew=146)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐3】【问题背景】如图1,在四边形ADBC中,∠ACB=∠ADB=90o,AD=BD, 探究线段AC,BC,CD之间的数量关系
小明同学探究此问题的思路是:将△BCD绕点D,逆时针旋转90o到△AED处,点B,C分别 落在点A,E处(如图2),易证点C,A,E在同一条直线上,并且△CDE是等腰直角三角形,所以CE=
CD,从而得出结论:AC+BC=
CD
【简单应用】
(1)在图1中,若AC=6,CD=
,则AB= .
(2)如图3,AB是⊙O的直径,点C. D在⊙O上,∠C=45o,若AB=25,BC=24,求CD的长.
【拓展延伸】
(3)如图4,∠ACB=∠ADB=90o,AD=BD,若AC=
,CD=
,求BC的长.(用含
,
的代数式表示)
小明同学探究此问题的思路是:将△BCD绕点D,逆时针旋转90o到△AED处,点B,C分别 落在点A,E处(如图2),易证点C,A,E在同一条直线上,并且△CDE是等腰直角三角形,所以CE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
【简单应用】
(1)在图1中,若AC=6,CD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86391dc521a0d9de2a6e08ed04a9ac63.png)
(2)如图3,AB是⊙O的直径,点C. D在⊙O上,∠C=45o,若AB=25,BC=24,求CD的长.
【拓展延伸】
(3)如图4,∠ACB=∠ADB=90o,AD=BD,若AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/2019/12/16/2356443907530752/2358373766070272/STEM/9da4bf7ad623493a852763d994594ab1.png?resizew=552)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐1】如图,画出
的两条直径,依次连接这两条直径的端点,得一个四边形,判断这个四边形的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://img.xkw.com/dksih/QBM/2018/10/31/2065277190520832/2068491566981120/STEM/8c652f5e0836472a9d8a5ddfe2ef0c31.png?resizew=76)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图,
是
的直径,
是
的弦,延长
到点C,使
,连接
,过点D作
,垂足为E.
(1)求证:
;
(2)若
的半径为4,
,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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0145eeb463f49ec362d52ef68dab367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/1e77937e-7c86-45af-b9ed-5a2b6c8607f5.png?resizew=141)
您最近一年使用:0次