四边形ABCD是⊙O的内接四边形,连结AC、BD,且DA=DB.
![](https://img.xkw.com/dksih/QBM/2019/11/27/2343070107688960/2344255635423232/STEM/ced5a8f156e34033b0f31e3e61bca454.png?resizew=410)
(1)如图1,∠ADB=60°.求证:AC=CD+CB.
(2)如图2,∠ADB=90°.
①求证:AC=
CD+CB.
②如图3,延长AD、BC交于点P,且DC=
CB,探究线段BD与DP的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2019/11/27/2343070107688960/2344255635423232/STEM/ced5a8f156e34033b0f31e3e61bca454.png?resizew=410)
(1)如图1,∠ADB=60°.求证:AC=CD+CB.
(2)如图2,∠ADB=90°.
①求证:AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
②如图3,延长AD、BC交于点P,且DC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
更新时间:2019-11-29 11:43:12
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图1,在Rt
中,
,AC=BC=4,D是AB的中点.延长
至点
,在
右侧作![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dbfed4adc6b576f875ce75e35ed4b34.png)
,点
为射线
上一点,连结
交
于点
,过点
作
交
于点
.
(1)求证:
;
(2)如图 2,点
在射线
上,且
平分
,连结
.
①求证:
;
②当
是以
为腰的等腰三角形时,则
.(直接写出答案,结果保留根号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf361ea6533d0d319a12ad236fa4cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dbfed4adc6b576f875ce75e35ed4b34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7448de2b3f953e6fdf3d12da0ab454db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fc9ef7d389f8ee4f5a3ee6fff56249.png)
(2)如图 2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f5de5fc2f03ae1db5d8ee7e324c904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5727022ce87b7a27ab90e6e9bf0bb1.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e618e42150fd8f0bb574a72cb029b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/6/96bbde02-4d6a-43ae-9468-4331d664a3f9.png?resizew=508)
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【推荐2】如图所示:△ABC是等腰直角三角形,BC=AC,直角顶点C在x轴上,一锐角顶点B在y轴上.
(1)如图1所示,若C的坐标是(2,0),点A的坐标是(﹣2,﹣2),求:点B的坐标;
(思路提示:过点A作AD⊥x轴于点D,通过证明△BOC≌△CDA来达到目的.)
(2)如图2,若y轴恰好平分∠ABC,AC与y轴交于点D,过点A作AE⊥y轴 于E,问BD与AE有怎样的数量关系,并说明理由;
(3)如图3,直角边BC的两个端点在两坐标轴上滑动,使点A在第四象限内,过A点作AF⊥y轴于F,在滑动的过程中,两个结论①
为定值;②
为定值,只有一个结论成立,请你判断正确的结论加以证明,并求出定值.
(1)如图1所示,若C的坐标是(2,0),点A的坐标是(﹣2,﹣2),求:点B的坐标;
(思路提示:过点A作AD⊥x轴于点D,通过证明△BOC≌△CDA来达到目的.)
(2)如图2,若y轴恰好平分∠ABC,AC与y轴交于点D,过点A作AE⊥y轴 于E,问BD与AE有怎样的数量关系,并说明理由;
(3)如图3,直角边BC的两个端点在两坐标轴上滑动,使点A在第四象限内,过A点作AF⊥y轴于F,在滑动的过程中,两个结论①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc87843e85e51c58560bb7cc53c57c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445f31e887624278f3b8a9cac8bfd77d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/75db3d3a-7e20-4ce9-8e06-fcd363102e10.png?resizew=437)
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【推荐1】如图,梯形
中,
,
,点
是
延长线上一点,
,
,
,
垂直于射线
,垂足为点
.
是平行四边形;
(2)连
,如果
是等腰三角形,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f07a876244afec67a0eca4d45c2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)连
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faee0268e5ede6318697e5a8509dd6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e496f4e3c850f3515525fd93148fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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【推荐2】如图,
,
,点C在边
上,点A,C,E在同一直线上.
(1)求证
;
(2)点O是
上一点,
,连接
并延长交
于点F.
①求证:点F是
的中点;②求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c317e500fcd9edc119758e9fa1aeb962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ad36a737552d3d8105249312918de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/5eb48761-58ca-4f3b-9944-58122981c4d5.png?resizew=160)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fd0abb3f3274002d4e448b5e42637.png)
(2)点O是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e20051ed26c7b6ff889a4fc9ee39b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①求证:点F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286a7cd1970399f60948b226a9fc5120.png)
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解答题-问答题
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名校
【推荐1】如图,
为等边三角形,
为
边上一点,连接
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/63eade1b-0cec-4a42-9054-ddf187c5f484.png?resizew=347)
(1)如图1,若
,求
的长;
(2)如图2,在
延长线上取一点
,连接
,使得
,求证:
;
(3)如图3,在(2)问的条件下,若
,当
最小时,在线段
上有一动点
,连接
,将
沿
翻折得到
,连接
,在线段
上取一点
,使得
,当
最大时求
的面积,直接写出答案.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9cbe96ac3f2f6830e3c58ec0aa375b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/63eade1b-0cec-4a42-9054-ddf187c5f484.png?resizew=347)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43914981731f51241b21ef11449fb4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a01d28f9c743d1cd10ee2b93a05c4f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d918126f7224aeccf1eb239e4d25e3a.png)
(3)如图3,在(2)问的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4590b1db8451f30e1021e68b8359c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d493b4c84d8dc832e323a0bcd0db5589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb38fe5a2ad3274048987d296799e6fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b047b20afc82f1a2be470544f8c6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b047b20afc82f1a2be470544f8c6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d11314062d795e2ed3943f7c590822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80110e884d8a8ad798087ab3d2a54a18.png)
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【推荐2】问题呈现:如图1,在
中,
,以
为边向外作等边
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/4ee66f5a-d932-4296-88dd-cfdff4f2be9c.jpg?resizew=428)
操作探索:小明同学为了寻找
与已知线段
、
之间的数量关系,他将问题特殊化,将线段
绕
点顺时针旋转
到
上,如图
,进而联想到自己非常熟悉的图
模型,以
为边作等边
,连
.
(1)如图3,直接写出
与
间的数量关系_________;
(2)如图1,求
的长.
理解运用:
(3)根据以上探索,如图4,在四边形
中,
.若
,
,求
的长.
延伸拓展:
(4)已知,如图5,
为正
内一点,
.直接写出以
,
、
为边构成的三角形各个内角的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496a29ee5ad8e81dc47e9d27b6e60463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/4ee66f5a-d932-4296-88dd-cfdff4f2be9c.jpg?resizew=428)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/f441f56f-1472-4197-bd7a-9872a1d38b5c.jpg?resizew=249)
操作探索:小明同学为了寻找
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
(1)如图3,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
(2)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
理解运用:
(3)根据以上探索,如图4,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c37e0383f29966246a5ef2bae3ecbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
延伸拓展:
(4)已知,如图5,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128a99c709ccb7b0c414fc6c4bdb475a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
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较难
(0.4)
【推荐1】有公共顶点A的两个正方形
与
,连接
,点M是
的中点,连接
交
于点N.
上时,直接写出线段
与
之间的数量关系和位置关系:
(2)如图2,将正方形
绕点A顺时针旋转,线段
与
之间的数量关系和位置关系是否仍然成立?请说明理由:
(3)如图3,将正方形
绕点A顺时针旋转,当点E在边
的延长线上、点G在边
上时,连接
与
相交于点H,
①求
的度数;
②连接
交
于点I,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e94ecf703cf3518e827a1c538e7173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137717f0e360e82319ced7e3a6c69b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)如图2,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(3)如图3,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae55a0c2394db34861f116b0a6d3b0e.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6550f60e7ce9ed5904b1719209b8769.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图1,
点为
轴正半轴上一点,
交
轴于
、
两点,交
轴于
、
两点,
点为劣弧
上一个动点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/43ac8a3a-cc98-4081-a724-ddac213de569.png?resizew=615)
(1)
的度数为
;
(2)如图2,连结
,取
中点
,连结
,则
的最大值为 ;
(3)如图3,连接
,
.若
平分
交
于
点,求线段
的长;
(4)如图4,连接
、
,当
点运动时(不与
、
两点重合),求证:
为定值,并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e1ae4eb7c1be382c68d70a725e69fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/43ac8a3a-cc98-4081-a724-ddac213de569.png?resizew=615)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图2,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d221944148d71e2e1bc76040aefb8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
(4)如图4,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf8c7485b305ac3be306d78c9d3156e.png)
您最近一年使用:0次