如图:已知线段
,射线AS垂直于AM,点N在射线AS上,设
,点P在经过点N且平行于AM的直线上运动,
的平分线交直线NP于点Q,过点Q作
,交线段AM于点B,连接PB交AQ于点C,以Q为圆心,QC为半径作圆.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/149c31cd-2c6a-449c-84f5-c3347a6e8b55.png?resizew=205)
(1)求证:PB与
相切;
(2)已知
的半径为3,当AM所求直线与
相切时,求n的值及PA的长;
(3)当
时,若
与线段AM只有一个公共点,则
的半径的取值范围是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a973f7b8e6acbd272a931d750d48b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc268d27f636e3417a64ad34c96a1a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f156c990df31740ae945bd61d52b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57379c468e5b085427815fe6cfe4d34c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/149c31cd-2c6a-449c-84f5-c3347a6e8b55.png?resizew=205)
(1)求证:PB与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
更新时间:2022-03-11 11:41:44
|
相似题推荐
解答题-作图题
|
困难
(0.15)
名校
【推荐1】在平面直角坐标系
中,
的半径为1,对于线段
,给出如下定义:若将线段
沿着某条直线
对称可以得到
的弦
(
,
分别为A,B的对应点),则称线段
是
的以直线
为对称轴的对称的“反射线段”,直线
称为“反射轴”
![](https://img.xkw.com/dksih/QBM/2022/12/13/3130066812207104/3168209705041920/STEM/919c6341856349a8b354684673dca45c.png?resizew=640)
(1)如图1,线段
、
、
中是
的以直线
为对称轴的“反射线段”有___________;
(2)已知A点的坐标为
,B点坐标为
,
①如图2,若线段
是
的以直线
为对称轴的“反射线段”,画出图形,反射轴
与y轴的交点M的坐标是___________.
②若将“反射线段”
沿直线
的方向向上平移一段距离S,其反射轴
与y轴的交点的纵坐标
的取值范围为
,求S的取值范围.
(3)已知点M、N是在以
为圆心,半径为
的圆上的两个动点,且满足
,若
是
的以直线
为对称轴的“反射线段”,当M点在圆上运动一周时,反射轴l与y轴的交点的纵坐标的取值范围是___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2022/12/13/3130066812207104/3168209705041920/STEM/919c6341856349a8b354684673dca45c.png?resizew=640)
(1)如图1,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)已知A点的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c832f2474efe89961ef41e884da7660c.png)
①如图2,若线段
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
②若将“反射线段”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7e66aae2e0bc0d5b5a3ffa7e4d9221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a2396c671fb0b83df5cad5d5889449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25063ef4849bdc47c9998b48a07bba4f.png)
(3)已知点M、N是在以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c2272e0d10d6dd9706e6324d8e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解答题-问答题
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困难
(0.15)
【推荐2】如图,直线y=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
x+8与x轴交于A点,与y轴交于点B,动点P从A点出发,以每秒2个单位速度沿射线AO匀速运动,同时动点Q从B点出发,以每秒1个单位的速度沿射线BA方向向点A匀速运动,当一个点停止运动,另一个点也随之停止运动,连接PQ,设运动的时间为t(秒).
(1)用t的代数式表示AP= ,AQ=
(2)当t为何值时,PQ∥OB?
(3)若点C为平面直角坐标系内一点,是否存在t值,使得以A、P、Q、C为顶点的四边形为菱形?若存在,求出Q点坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
(1)用t的代数式表示AP= ,AQ=
(2)当t为何值时,PQ∥OB?
(3)若点C为平面直角坐标系内一点,是否存在t值,使得以A、P、Q、C为顶点的四边形为菱形?若存在,求出Q点坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421338910285824/2422067031777280/STEM/dc735646e1f14bdc9b5c2efb154c467d.png?resizew=474)
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解答题-证明题
|
困难
(0.15)
【推荐1】综合与探究
问题情境:如图1,在
中,
,
,
.
于点
,
的平分线交
于点
,交
于点
.试判断
与
的数量关系,并说明理由.
数学思考:(1)请你解答上述提出的问题;
实践探究:(2)如图2,善思小组将
沿线段
平移,使点
恰好落在
处,点
,
对应点分别是点
,
,连接
.
①请你直接写出四边形
的形状是______;
②请求出平移的距离
;
(3)智慧小组将
绕点
逆时针旋转,得到
,使得
,点
,
的对应点分别是点
,
,连接
,直接写出
的长.
问题情境:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
数学思考:(1)请你解答上述提出的问题;
实践探究:(2)如图2,善思小组将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827be85b8f921007a5cf9edb64bd3491.png)
①请你直接写出四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333157e2e829905222b99a5ccd6df241.png)
②请求出平移的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)智慧小组将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b0e8d6874ca0163575176a49accf45.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
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解答题-问答题
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困难
(0.15)
【推荐2】已知:在平面直角坐标系中,四边形
满足
,
,
,且
.
的解析式;
(2)如图2, 将线段
沿线段AC方向从点A向点C平移,记平移中的线段AB为
,当△
为直角三角形时,在x轴上找一点P,使
最大,请求出
的最大值;
(3)如图3,将线段OC绕点O顺时针旋转角度
(
),记旋转中的线段OC为
,在旋转过程中,设线段
所在直线与直线
交于点
,与直线
交于点
,是否存在角
,使得△
为等腰三角形?若存在,请直接写出角
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa878fbb9d7d3b9f6d36ccb703ff2d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad39ccdd4fe036dbf08efa9b20a842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32279cf0de44707705018bc58e08074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac60c80d4e7a767b37931f6720d7ade6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2, 将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d4a94d7433c7b29ae63331f95e2b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf37c334d0ef2cbd8df573a2e821524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf37c334d0ef2cbd8df573a2e821524.png)
(3)如图3,将线段OC绕点O顺时针旋转角度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601c71d99134b9202f40b941637879ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1586d3ecae6747312b7892bac03cf8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1586d3ecae6747312b7892bac03cf8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a718a85add40589bbf788876a755a88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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,直线
经过点
,与x轴交于A,D为x轴负半轴上的一点,且
,以
为直径作
,连结
.
(1)求出b的值及直线
的函数表达式.
(2)在线段
上取点P,连结
并延长交
于点C,连结
交
于点E,
①若
,求证:
.
②当
等于
中的某一个角时,求
的长.
(3)点P关于直线
的对称点
恰好落在
上时,请直接写出四边形
的面积为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c26f3f069f680a7b317386d6bcedf49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93842cf36b1107534c3904d18ba3ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c35c43d90814396ff06336fa45e9650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/4ceb2148-bdaf-43d4-a1a5-fcddbbd2c6bf.png?resizew=361)
(1)求出b的值及直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce68251e6c8225336d5173d48e2b6dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb82e4d13ece080be786c4ec220d8c8.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a02c61cb552d1173b18b42f8d160dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(3)点P关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176385d91d5e29324fce4a932eff6a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d405bdf75bbd9ed19c5bfbd66c6f0f.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,
为半圆
的直径,
,过
作
的垂线
,点
为直线
上一点,连接
交半圆
于点
,以
为圆心,
为半径作圆弧交
于点
(
不与
重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/5ca0632b-4bcb-4d3e-ad05-ab53a6904673.png?resizew=536)
(1)如图2,连接
、
交于点
,若
为
重心时,求
的值;
(2)如图2,设
,
,求
关于
的函数关系式,并写出定义域;
(3)延长
交
于点
,延长
交射线
于点
,
①设
与线段
交于点
,连接
,
的度数是否发生变化,若不变,请求出度数;若变化,请至少给出两种不同情况下所对应的度数;
②若
与
相似,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3a593f7126c0f4629df5ae20c5500a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/5ca0632b-4bcb-4d3e-ad05-ab53a6904673.png?resizew=536)
(1)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e107ffeef6779a978aca01cf36512767.png)
(2)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55bda5be4caa88c24327f5cb964a451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9d3ef6ee219fd994504cc1a5f0eef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f986c181183d8e7e45655e6c5b5d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a111d53f28126c3ecd5f18b13770de.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a4a56eb2918d8051b176c4363a3fc87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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