如图,AB是⊙O的直径,弦CD⊥AB于点E,点F是⊙O上一点,且
=
,连接FB,FD,FD交AB于点N.
![](https://img.xkw.com/dksih/QBM/2020/7/6/2499815257473024/2500124562939904/STEM/1b1ab313fd3b4a1dbf1d59f4d7ed1241.png?resizew=200)
(1)若AE=1,CD=6,求⊙O的半径;
(2)求证:△BNF为等腰三角形;
(3)连接FC并延长,交BA的延长线于点P,过点D作⊙O的切线,交BA的延长线于点M.求证:ON•OP=OE•OM.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf92f47c9d324d4072c3219d9172119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02335cfc6eb52ab5d8625e7bd559c9d6.png)
![](https://img.xkw.com/dksih/QBM/2020/7/6/2499815257473024/2500124562939904/STEM/1b1ab313fd3b4a1dbf1d59f4d7ed1241.png?resizew=200)
(1)若AE=1,CD=6,求⊙O的半径;
(2)求证:△BNF为等腰三角形;
(3)连接FC并延长,交BA的延长线于点P,过点D作⊙O的切线,交BA的延长线于点M.求证:ON•OP=OE•OM.
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相似题推荐
解答题-证明题
|
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(0.4)
【推荐1】如图,
是
的直柽,弦
于H,点E在
上,且
,
与
交于点G,与
交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/23/db3471ab-9e84-42e5-83ed-e86d107f74b3.png?resizew=171)
(1)求证,
.
(2)连接
,试判断
与
的位置关系,并说明理由.
(3)过点D作
的切线,交
的延长线于点P,点M在
上.若
,
,试探究在点M的运动过程中,
的值是否发生变化?若不变,求出其值,若变化,说明变化规律.
![](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/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adf4fa25af2d5924cf1cfaa8f630dc4.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/23/db3471ab-9e84-42e5-83ed-e86d107f74b3.png?resizew=171)
(1)求证,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e76ef8ead5a1fd4ec272e886174b14f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979d5406af7e951f386dbb55a9617eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cfeb35addf27f2379a8e5f87c9b952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10574b05422cbe57878d67b8d2bae3fe.png)
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解题方法
【推荐2】如图,点
和动点
在直线
上,点
关于点
的对称点为
,以
为边作
,使
,
,作
的外接圆
.点
在点
右侧,
,过点
作直线
,过点
作
于点
,交
右侧的圆弧于点
.在射线
上取点
,使
,以
,
为邻边作矩形
.设
.
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719215529607168/2720906085613568/STEM/a76f7979-7031-4b77-ac22-12434f018d79.png)
(1)用关于
的代数式表示
,
.
(2)当点
在点
右侧时,若矩形
的面积等于90,求
的长.
(3)当点
在点
右侧时,作直线
交
于点
,若
的弦心距为1,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019b682f2ad1d897b6ce9d0a7b41538d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89dd3ea4447c6ab5dbce080682d32cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09290ea78b2eee4153b49d58d75aec25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea6ea6943574c413581edb1ab52c2fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db35bdc02ac2b48604843265e5006d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82901484b0b4b192cdd45a88c6163aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42daba3c904ff54da22e51f1812ac4b0.png)
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719215529607168/2720906085613568/STEM/a76f7979-7031-4b77-ac22-12434f018d79.png)
(1)用关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf757b473eb160e42173982184ac5b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82901484b0b4b192cdd45a88c6163aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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解答题-证明题
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较难
(0.4)
【推荐1】如图,
为
的直径,
为
的延长线上一点,过点
作
的切线,切点为
,连接
,过点
作
交
延长线于点
.
![](https://img.xkw.com/dksih/QBM/2023/5/14/3237442127134720/3240350400675840/STEM/6c32ac1c1c1844b2b4b2aa1548d04f23.png?resizew=154)
(1)求证:
;
(2)若
=2,
=4,求
的半径及
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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0aaa5cf7dafac1b64eafe84cae5674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2023/5/14/3237442127134720/3240350400675840/STEM/6c32ac1c1c1844b2b4b2aa1548d04f23.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94de30a9ba84c099323e91ddbab9798a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】如图,在等腰直角三角形
中,
,点
在边
的延长线上,将线段
绕点
逆时针旋转
得到线段
,连接
,
为
的中点.
的长;
(2)连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
,请猜想
与
的数量和位置关系,并证明你的结论;
(3)在(2)的条件下,若点
为
中点,连接
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74494fc175645c2b757a8dd5a1f8d8b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)在(2)的条件下,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a06f68c90d448e30234eebafcf0fca7d.png)
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名校
【推荐1】如图,已知AB=AE=2,∠BAE=90°,在矩形BCDE中,BE=2BC.在线段AE,DC上各取点F、G,使DG=
AF=
,连接FG.
![](https://img.xkw.com/dksih/QBM/2021/8/20/2790023416815616/2794528068444160/STEM/f3cd89c93a4047e0ad46d4f5c3b0e19e.png?resizew=247)
(1)当
时,证明:FG⊥BE;
(2)求t为何值时,FG⊥BD;
(3)连接BF、BG、EG,设△BGF,△EGF的面积分别为S1、S2,当S1=3S2时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b27d1527f81520e833e9bd4adeb4bc6.png)
![](https://img.xkw.com/dksih/QBM/2021/8/20/2790023416815616/2794528068444160/STEM/f3cd89c93a4047e0ad46d4f5c3b0e19e.png?resizew=247)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0b28126fc71f25ea7e92be595b26f3.png)
(2)求t为何值时,FG⊥BD;
(3)连接BF、BG、EG,设△BGF,△EGF的面积分别为S1、S2,当S1=3S2时,求t的值.
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解答题-作图题
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【推荐2】【概念认识】定义:对角线互相垂直且相等的四边形叫做垂等四边形.
(1)如图1,已知在垂等四边形
中,对角线
与
交于点E,若
,
,
,则
的长度=______cm.
【数学理解】(2)在探究如何画“圆内接垂等四边形”的活动中,小李想到可以利用八年级的所学三角形全等.如图2,在
中,已知
是弦,
是半径,求作:
的内接垂等四边形
.(要求:尺规作图,不写作法,保留痕迹)
【问题解决】(3)如图3,已知A是
上一定点,B为
上一动点,以
为一边作出
的内接垂等四边形(A、B不重合且A、B、O三点不共线),对角线
与
交于点E,
的半径为
,当点E到
的距离为
时,求弦
的长度.
(1)如图1,已知在垂等四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c26ed4600cef25f040caa553ac21051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
【数学理解】(2)在探究如何画“圆内接垂等四边形”的活动中,小李想到可以利用八年级的所学三角形全等.如图2,在
![](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/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【问题解决】(3)如图3,已知A是
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】AB是⊙O的弦,OD⊥AB交⊙O于点F,P是OF延长线上一点,连接PA、PB、AF、OA.
![](https://img.xkw.com/dksih/QBM/2021/12/31/2884528188366848/2887404179480576/STEM/b2f45434-07a8-495a-a551-9b1bef7dfb92.png?resizew=613)
(1)如图1,若OA⊥AP,求证:∠DAF=∠PAF;
(2)如图2,若∠DAF=∠APF,AB=16,OP=22,求OD的长.
![](https://img.xkw.com/dksih/QBM/2021/12/31/2884528188366848/2887404179480576/STEM/b2f45434-07a8-495a-a551-9b1bef7dfb92.png?resizew=613)
(1)如图1,若OA⊥AP,求证:∠DAF=∠PAF;
(2)如图2,若∠DAF=∠APF,AB=16,OP=22,求OD的长.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在
中,
,过点
作
于点
,点
是线段
上一动点,过三点
作
交
于点
,过点
作
交
的延长线于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/2019/5/6/2197769636806656/2198041121112064/STEM/d938d66732c94ba48bfd07724336ac63.png?resizew=182)
(1)求证:四边形
为平行四边形.
(2)当
时,求
的长.
(3)在点
整个运动过程中,
①当
中满足某两条线段相等,求所有满足条件的
的长.
②当点
三点共线时,
交
于点
,记
的面积为
,
的面积为
,求
的值. (请直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1033e4bd6e3b4df3b209e7e7fa64af17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853a0ff3b326383dc943ba305d90d0c1.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6018fc8888a17457fb1eedf315b934b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/2019/5/6/2197769636806656/2198041121112064/STEM/d938d66732c94ba48bfd07724336ac63.png?resizew=182)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02336aa7db4ef7431f8673d361c74a13.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543a1a729d497323644ca00521c03141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b635a0bf3a68658fadaed66275a04b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068850d7f3d86370c788ea41864619b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d481a66411136548889c403d044920e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87c9251fd357c7ed949fa11f9be4d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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