四边形
是
的圆内接四边形,线段
是
的直径,连结
.点
是线段
上的一点,连结
,且
,
的延长线与
的延长线相交于点
.
(1)求证:四边形
是平行四边形;
(2)若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067006f8ffac485b7aceeb30d715276f.png)
①求证:
为等腰直角三角形;
②求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66e9514cde2949b945b982ba4397784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419333ff9872da3ebfe9f65dd363578c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560d3755f11c630f340ad4916ca5831a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf21f820f36f4d31c11de79194bda91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067006f8ffac485b7aceeb30d715276f.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26a3617ee3e697d1702720a08415a43.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249590156967936/2249700647854080/STEM/f8231f1c9e7347b68d328e2d369b49f8.png?resizew=257)
更新时间:2019-07-18 21:30:35
|
相似题推荐
解答题-证明题
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【推荐1】如图,
中,
于点D,E是
上一点,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/f755a503-2a79-456d-8210-c0f78e6009e7.png?resizew=240)
(1)求证
;
(2)若
,求证:
;
(3)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5976cd61584e0dc2e5c2a555f65cbd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/f755a503-2a79-456d-8210-c0f78e6009e7.png?resizew=240)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fc033de09ac4b53369e72415f79784.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343809950f44f2675d40dd9abb895df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995f8d5c1e57b541c10f7c29645add31.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0b22648caf5f78bf816a2d2b881891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a21782163ade7050baa9b96b22c196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8da43afaa31e754d6a4427d4278e9be.png)
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真题
名校
【推荐2】如图,抛物线与
轴交于
(
,0)、
(
,0)两点,且
,与
轴交于点
,其中
是方程
的两个根.
(1)求抛物线的解析式;
(2)点
是线段
上的一个动点,过点
作
∥
,交
于点
,连接
,当
的面积最大时,求点
的坐标;
(3)点
在(1)中抛物线上,点
为抛物线上一动点,在
轴上是否存在点
,使以
为顶点的四边形是平行四边形,如果存在,求出所有满足条件的点
的坐标,若不存在,请说明理由.
![](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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8ca3aa2d1ba52e82613d0d65d800e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffa6a8471c126c4c6b789490d84144b.png)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34ea4887dc1dacb67484149086cda97.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f71b234c8080dba00c2dac4dc72e5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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【推荐3】综合与实践
综合与实践课上,老师让同学们以“两个相似矩形的平移”为主题探究线段之间的数量关系:如图,矩形
与矩形
相似,其中
,
,点E、F在直线
上,且点C、D、G、H在直线
的同侧,矩形
沿直线
左右平移,O为
的中点,直线
与直线
相交于点P(点P、D不重合),直线
与直线
相交于点Q(点Q、C不重合),试探究
与
之间的数量关系.
(1)如图1,平移矩形
,当
,点A、E重合时,线段
与
之间的数量关系是 ;
【迁移探究】
(2)继续平移矩形
,对任意正数k,(1)中的判断是否都成立,请就图2的情形说明理由;
【拓展应用】
(3)如图3,若
,
,
,平移矩形
,连接
交
于点M,当
是直角三角形时,请直接写出OA的长.
综合与实践课上,老师让同学们以“两个相似矩形的平移”为主题探究线段之间的数量关系:如图,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408928f10c4bf86b1e47e25bd7ddcac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608f35579855ab547215b6b01a62bea0.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/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
(1)如图1,平移矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
【迁移探究】
(2)继续平移矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
【拓展应用】
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a8d71c3a6c7d03ab048376ed552ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
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【推荐1】【问题提出】小慧同学遇到这样一道问题,如图①,在
中,点D为边
的中点,以点D为圆心,
为直径作圆,
的平分线交此圆于点P,点P在
内部,连接
.
求证,
的面积等于
面积的一半.
并延长,交
于点Q,利用
形状的特殊性解决问题,请你利用小慧的做法完成【问题提出】中的证明;
【问题拓展】如图②,在四边形
中
平分
.
,若
,则
面积的最大值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
求证,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a1eda00fc2d64ce3a42004b24adf00.png)
【问题拓展】如图②,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25f5b5c3333bf2d6369e14496df3108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e7d8e852c834190b9b9d8f21c88cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
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【推荐2】如图,点C是等边△ABD的边AD上的一点,且∠ACB=75°,⊙O是△ABC的外接圆,连结AO并延长交BD于E、交⊙O于F.
(1)求证:∠BAF=∠CBD;
(2)过点C作CG∥AE交BD于点G,求证:CG是⊙O的切线;
(3)在(2)的条件下,当AF=2
时,求
的值.
(1)求证:∠BAF=∠CBD;
(2)过点C作CG∥AE交BD于点G,求证:CG是⊙O的切线;
(3)在(2)的条件下,当AF=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e82afc430f365f95da45a1c828724a0.png)
![](https://img.xkw.com/dksih/QBM/2019/6/12/2223851661025280/2225299619201024/STEM/56d164d767714a699f22dea3c493bb11.png?resizew=123)
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