如图,
是
的外接圆,点
在
延长线上,连接
,满足
.
(1)求证:
与
相切;
(2)若
的半径为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34db18c1e4ffab8da29912825b372376.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/f47e9984-3eb7-4d35-99f3-a88ffd1b9de2.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d8431d58b5e89f6edb541c7a00edd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
更新时间:2023-05-24 19:00:38
|
相似题推荐
解答题-证明题
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适中
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【推荐1】如图,在▱ABCD中,对角线AC、BD交于点O,E是AD上一点,连接EO并延长交BC于点F,连接AF、CE,EF平分∠AEC.
![](https://img.xkw.com/dksih/QBM/2021/7/7/2758954548502528/2818487854776320/STEM/518c5070a26746c6a7c478a0242e9bfe.png?resizew=375)
(1)求证:四边形AFCE是菱形.
(2)若∠DAC=60°,EF=4
,求四边形AFCE的面积.
![](https://img.xkw.com/dksih/QBM/2021/7/7/2758954548502528/2818487854776320/STEM/518c5070a26746c6a7c478a0242e9bfe.png?resizew=375)
(1)求证:四边形AFCE是菱形.
(2)若∠DAC=60°,EF=4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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【推荐2】如图,在平行四边形
中,
,以
为直径的
交
于点
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120ce9275569111a46beddccacd43854.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/0d3a633b-57b8-4223-96d4-d404d43ddcb2.png?resizew=216)
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【推荐1】问题情境:
在数学课上,张老师带领学生以“图形的平移”为主题进行教学活动.在菱形纸片
中,
,对角线
,将菱形沿对角线
剪开,得到
和
.将
沿射线
方向平移一定的距离,得到
.
观察发现:
(1)如图①,菱形
中,
;
如图②,连接
,四边形
的形状是 ;
(2)将
沿直线
翻折,得
,如图③,然后沿射线
方向进行平移,连接
,若添加一个条件,能否使得四边形
是一个特殊的四边形?若能,请写出添加的条件和这个特殊的四边形,并写出证明过程,若不能,说明理由.
(3)在(2)的条件下,设
和
相交于点
,当
是
的三等分点时,直接写出
的面积.
在数学课上,张老师带领学生以“图形的平移”为主题进行教学活动.在菱形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
观察发现:
(1)如图①,菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629f896496e9a6fd7df6e0a56e0a6243.png)
如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c30c0d64b256b3efc386ff6276f1ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f46b357e543eb2e895d0ea4742f4546.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da547af5752515964c58948ec3a5f89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe08221bb58fef1459a6b6412497d187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f920913237cb68d097c13578691112f.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f574463a3c3541e3e42cf7e1fee8e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369c774635fb4384dcbabe732c7c5b27.png)
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【推荐2】在一次数学研究性学习中,小敏将两个全等的直角三角形纸片
和
拼在一起,使点
与点
重合,点
与点
重合(如图1),其中
,
,
,并进行如下研究活动,将图1中的纸片
沿
方向平移,连结
,
(如图2),当点
与点
重合时停止平移.
(1)图2中的四边形
是平行四边形吗?请说明理由.
(2)当纸片
平移到某一位置时,小敏发现四边形
为矩形(如图3),求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/9a2df0928a4c4337d9796a9aa67d8921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1563d947a4fe6ea15b9cd5365f821d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dda5325fd8262e7d71eb9a0426bac8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/bacd1445-96ac-4d98-a92d-9b06ed29f7f8.png?resizew=391)
(1)图2中的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
(2)当纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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【推荐3】数与形是数学中的两个最古老,也是最基本的研究对象,它们在一定条件下可以相互转化,数形结合就是把抽象的数学语言、数量关系与直观的几何图形、位置关系结合起来,通过“以形助数”或“以数解形”使复杂问题简单化,抽象问题具体化,从而起到优化解题途径的目的.
【思想应用】
(1)已知a,b均为正实数,且
,求
的最小值.通过分析,小军想到了构造图形解决此问题:如图,
,点
是线段
上的动点,且不与端点重合,连接
,设
.
①用含a的代数式表示
______,用含
的代数式表示
______.
②据此写出
的最小值:______.
【类比应用】
(2)根据上述方法,求代数式
的最小值.
【思想应用】
(1)已知a,b均为正实数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b40b1544e62be8b9e9f4dc9f2c0c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e5460f661cb9f0cf23b9eca22fe9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d65b3897e499936e27cab6ba7c01eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1d1b69dfd968b605985b76bc817a225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1829481a7a9d830c1f2c9c4ca77bf6f0.png)
①用含a的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
②据此写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e5460f661cb9f0cf23b9eca22fe9d0.png)
【类比应用】
(2)根据上述方法,求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d92158cd34581fcae4ce64b7f73e91fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/03fcab05-3c5a-4b11-b310-cab236df70a5.png?resizew=147)
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名校
【推荐1】如图,
是
的直径,点A是
上异于C,D的一点,点B是
延长线上一点,连接
,
,
,且
.
(1)求证:直线
是
的切线;
(2)若
,作
的平分线
交
于点P,交
于点E,连接
、
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eacda8e4cd7f3712cb8f514cc13b5c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/993126f5-e530-4ecc-9e36-73474ba767a3.png?resizew=239)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38586fe93acaacaeabe67feea485b92b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be58ea6ca37a850422631eb3e994d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f7be9d7393f24e4bb12298dd016c6d.png)
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【推荐2】如图,
为
的直径,弦
,
平分
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/098d4de4-4eeb-4414-9b3d-3fcc033005bd.png?resizew=188)
(1)求证:
是
的切线;
(2)若
,求
的半径长.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a852c13de65877be1f43ac1f88f179d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01fb7cc752222306029fabbeb894a800.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/098d4de4-4eeb-4414-9b3d-3fcc033005bd.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee61e6a0d4a53656a6fd6dd662220c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐1】如图,从
外一点
作
的切线
,
,切点分别为
,
,
的直径
为
,连结
,
.
![](https://img.xkw.com/dksih/QBM/2018/9/15/2033146566975488/2034102237331456/STEM/bbf39b99a732401fad494ebce6c4719b.png?resizew=109)
求证:
;
求
的值;
若
,求劣弧
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.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/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://img.xkw.com/dksih/QBM/2018/9/15/2033146566975488/2034102237331456/STEM/bbf39b99a732401fad494ebce6c4719b.png?resizew=109)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c262f87b0f3708acd53519f1aa8ba17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79a3bb7348d7372a5d447234101058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60fc9e9f4f4fc83fb03bc099b4165a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】探究(一):如图1,在
中,
,D是
上一点(不与A,B重合),
交
于点E,连接
.设
的面积为S,
的面积为
.
(1)当
时,
______,
______.
(2)设
,请你用含字母的代数式表示
.
探究(二):如图2,在四边形
中,
,
,
,E是
上一点(不与A,B重合),
,交
于点F,连接
,设
,四边形
的面积为S,
的面积为
.请你利用问题1的解法或结论,用含字母n的代数式表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/19/30a1d3ea-0a69-473c-8c58-9ba82bdcfaae.png?resizew=282)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5573c56ad75073d60557483ad3181e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106175c37d7f9ac3dbd150cbe397acb8.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3be96420ac78c8621fcb47a45514fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcac3dc0daffc4df364f256e3dc50b47.png)
探究(二):如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d34ac97b116fc5c4e99d07dda1c50b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b9830a7d969f9ddb815230e756ba68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5a0a6e5b3f489a7032ea5116c96024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcac3dc0daffc4df364f256e3dc50b47.png)
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