如图,已知线段AB=2,MN⊥AB于点M,且AM=BM,P是射线MN上一动点,E,D分别是PA,PB的中点,过点A,M,D的圆与BP的另一交点C(点C在线段BD上),连结AC,DE.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923353931120640/2930573809082368/STEM/746be580e9534d3ca5d9da29d776db4e.png?resizew=278)
(1)当
时,求∠B和
的度数;
(2)求证:
;
(3)在点P的运动过程中,当
时,取四边形ACDE一边的两端点和线段MP上一点Q,若以这三点为顶点的三角形是直角三角形,且Q为锐角顶点,求所有满足条件的MQ的值.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923353931120640/2930573809082368/STEM/746be580e9534d3ca5d9da29d776db4e.png?resizew=278)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09625171c5eb09f3e1d44850d7abffcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469efa85a031f27ead9e05cff02eada2.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d384390f4e0a1e0abd4cc19382d94db.png)
(3)在点P的运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97850ca113ef8e5e09ffaf4213b459fd.png)
更新时间:2022-03-06 20:50:35
|
相似题推荐
【推荐1】已知点P为∠MAN边AM上一动点,⊙P切AN于点C,与AM交于点D(点D在点P的右侧),作DF⊥AN于F,交⊙O于点E.
(1)连接PE,求证:PC平分∠APE;
(2)若DE=2EF,求∠A的度数;
(3)点B为射线AN上一点,且AB=8,射线BD交⊙P于点Q,sin∠A=
.在P点运动过程中,是否存在某个位置,使得△DQE为等腰三角形?若存在,求出此时AP的长;若不存在,请说明理由.
(1)连接PE,求证:PC平分∠APE;
(2)若DE=2EF,求∠A的度数;
(3)点B为射线AN上一点,且AB=8,射线BD交⊙P于点Q,sin∠A=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/2020/3/18/2425335254941696/2435728501252096/STEM/32cd4cfecbc04295880d86a6311d4fff.png?resizew=221)
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【推荐2】对于平面直角坐标系xOy中的点A和点P,若将点P绕点A顺时针旋转90°后得到点Q,则称点Q为点P关于点A的“顺转点”,图1为点P关于点A的“顺转点”Q的示意图.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/54df9255-6a08-4061-a37f-5259d381fc52.png?resizew=584)
【知识理解】
(1)已知点A的坐标为(0,0),点P关于点A的“顺转点”为点Q.
①若点P的坐标为(1,0),则点Q的坐标为 ;
②当点P的坐标为 时,点Q的坐标为(2,-1);
③△PAQ是 三角形;
【知识运用】
(2)如图2,已知直线
与x轴交于点A.
①点B的坐标为(1,0),点C在直线
上,若点C关于点B的“顺转点”在坐标轴上,则点C的坐标是 ;
②点E在直线
上,点E关于点A的“顺转点”为点F,则直线AF的表达式为 ;
【知识迁移】
(3)如图3,已知直线l1:y=-2x+2与y轴交于点A,直线l2经过点A,l1与l2在A点相交所形成的夹角为45°,则直线l2的函数表达式为 ;
(4)点A是平面直角坐标系内一点,点P(2,0)关于点A的“顺转点”为点B,点B恰好落在直线y=-x上,当线段AP最短时,点A的坐标为 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/54df9255-6a08-4061-a37f-5259d381fc52.png?resizew=584)
【知识理解】
(1)已知点A的坐标为(0,0),点P关于点A的“顺转点”为点Q.
①若点P的坐标为(1,0),则点Q的坐标为 ;
②当点P的坐标为 时,点Q的坐标为(2,-1);
③△PAQ是 三角形;
【知识运用】
(2)如图2,已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
①点B的坐标为(1,0),点C在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
②点E在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
【知识迁移】
(3)如图3,已知直线l1:y=-2x+2与y轴交于点A,直线l2经过点A,l1与l2在A点相交所形成的夹角为45°,则直线l2的函数表达式为 ;
(4)点A是平面直角坐标系内一点,点P(2,0)关于点A的“顺转点”为点B,点B恰好落在直线y=-x上,当线段AP最短时,点A的坐标为 .
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【推荐1】在
中,弦
弦
,过
作
于
,延长
交
于
,连接
相
,
.
;
(2)如图2,连接
,延长
交
于
,过
作
交
于
,连接
和
,若
,求证:
;
(3)如图3,在(2)的条件下,连接
、
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502534dfabfcea51a7a69bb3046580c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a1658e10f6c0a46bb523084676ac67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff451ffda171160ba8aa0b662898843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf5839e4a3d6b66415eeee2784b56d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd4678832abebbe835f3032d11f4e49.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/48c03c93ce01e9c986194595004bc2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a716d3e10024a0b98e36b3d0078887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8ad4bc94a0ab0813a9a63e846ae7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5d21a1a239d8faced5c877d825f57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a8a798e8593a6df165bff365b3f0e5.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea3025de39ca14d0602f8913ff10c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8018ee82e412e070d88104229702b9e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a18a786351489b021709c8023e7633f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8ad4bc94a0ab0813a9a63e846ae7ce.png)
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【推荐2】已知:
为
的直径,
为圆心,点
,
分别为圆上一点,且
,连接
交
于点
,连接
.
.
![](https://img.xkw.com/dksih/QBM/2023/2/8/3170263496187904/3297807742681088/STEM/6ca2989e751c446d88dabdaf2c4a2722.png?resizew=381)
(1)如图1,求证:
是
的切线;
(2)如图2,点
为
内部一点,连接
,
,若
时,求证:
;
(3)在(2)的条件下,若
,
的半径为10,求
的长.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996b89406a816744a88614265ff4b26b.png)
![](https://img.xkw.com/dksih/QBM/2023/2/8/3170263496187904/3297807742681088/STEM/6ca2989e751c446d88dabdaf2c4a2722.png?resizew=381)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad3d793f7f940289d8613f2ab204626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a26ebb964cf4ccb8620ceb9610a94d5.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee03c566c0e7ce78d451053997eea8b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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【推荐1】如图.已知
为等腰直角三角形,
,
、
分别为
、
上的两点,
,连接
,将
绕点
逆时针旋转
得
,连接
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/ac2579ef-588e-4be5-b834-9354db516be4.png?resizew=420)
(1)如图1,当
时,若
,求
的长;
(2)如图2,连接
,
为
的中点,连接
,求证:
;
(3)如图3,连接
,将
绕点
顺时针旋转
得
,连接
、
、
,若
,当
取得最小值时,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/2e959e2f211cd4c6bc6ad772251241bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/ac2579ef-588e-4be5-b834-9354db516be4.png?resizew=420)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f43672e447170a07f44be5c5a08811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c5e57599c26885f7ce321e567cada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b795a5f054242e85b105083f7aacb5.png)
(3)如图3,连接
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925b91055c68dc3c9a1aa8d0f992994b.png)
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【推荐2】如图,
和
都是等腰直角三角形,
,
,
的顶点A在
的斜边
上,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/7c7e8cf7-9d95-4170-a0ca-d949508737a6.png?resizew=213)
(1)证明:
;
(2)当点A在线段
上运动时,猜想
和
之间的关系,并证明.
(3)在A的运动过程中,当
,
时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/7c7e8cf7-9d95-4170-a0ca-d949508737a6.png?resizew=213)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6583edecc4f25acf589edd9ff14f1eb.png)
(2)当点A在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53982c677cbf74e9ddf8d3483f9c470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)在A的运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d2bbdd30443a7b73738d051d9a5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐1】如图1,在平行四边形
中,对角线
交于点O,过点A作
交
的延长线于点E.
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427532820480/2875926454239232/STEM/db23746f-948e-4982-b811-b03b7976e202.png?resizew=758)
(1)若
,求
的长;
(2)如图2,过点C作
交
的延长线于点F,连接
.以
为直角边作
,其中
,连接
.若
,求证:
.
(3)在(2)的条件下,作射线
,点O点G分别在射线
上移动,得到点
,且保持
,M是线段
的中点,连接
,若
,当
最小时,请直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea1b19e6ab042da04c30907e1fabd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427532820480/2875926454239232/STEM/db23746f-948e-4982-b811-b03b7976e202.png?resizew=758)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f394fbee218a547aba6ced71c0b8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图2,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1a23f51a2ff0896988930f5209fc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e3b100c4297bd3aa96faa5b4fbe3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db54b8d657808049d40a9e922e5de4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a4dca12ce75d1a13b780b6d6557d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fa3d04620b45ec1427f80ad2fd100c.png)
(3)在(2)的条件下,作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0828c0f2bbad8e78c1b46fc438c4dd03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0828c0f2bbad8e78c1b46fc438c4dd03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3830d2c180b46713ae91e2b7fcd2b38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee71fc4ec5cbb573f12b1db59bcd349f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ead561289b0b48f4d186a4d3ff8995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a860edf2d09aeaf7f8a0efb8fe93a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5498a21de00786d6f88ff98ad57f3b34.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】如图,
是
的直径,弦
于点H,连接
,过
上一点E作
交
的延长线于点G,连接
交
于点F,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/1f5c8975-f46d-4900-b0b0-9d926e3b0fbb.png?resizew=301)
(1)求证:
是
的切线;
(2)延长
交
于点M,若
,
,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/8b757f0c42ae5c9a2d6a4b19e5877b27.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/c05f315ab14567942f699983b60d04be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9da441d03aaaf554fe33d3bf8952331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/1f5c8975-f46d-4900-b0b0-9d926e3b0fbb.png?resizew=301)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7adcf53b3e740e4c6cd21d36505b3c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76f6dbe519e314c4fa61fe8771afd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
您最近一年使用:0次