已知:如图,在平行四边形
中,
的平分线交
于点E,点F是
的中点,连接
并延长交
于点G,连接
.
(1)求证:四边形
是菱形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4e292c70dfde39378b24799ea94829.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/e2f7e33e-c6e8-4f71-afd2-55875c7570bc.png?resizew=209)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f27962a17200544a8b067dbe1225cb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564e238659b316ab3275829470ce0c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80418844d009b4c5bb0b357be74be6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
2023·浙江杭州·二模 查看更多[3]
2023年浙江省杭州市西湖区之江实验中学中考数学二模试题2024年浙江省中考数学模拟练习模拟预测题(已下线)专题07+平行四边形与特殊平行四边形1(5大易错点分析)-备战2024年中考数学考试易错题(浙江专用)
更新时间:2023-09-27 09:28:47
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
,C是
的中点,过点D作
,且
,连接
交
于F.
是菱形;
(2)若
,菱形
的面积为40,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab34c8e368a7a2346a3922f5c532823d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7812fb18d08020f2d6c2633dc79b8ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfa223e7b272346649538457c976864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50c9f8c4c875934ffb44ad34fd0303a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,平行四边形
中,
平分
交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/efd15766-2de1-4cbf-ac79-5501d689f45f.png?resizew=235)
(1)用尺规完成基本作图:作
的角平分线交
于点F(保留作图痕迹,不写作法);
(2)根据(1)中作图,连接
,求证:四边形
是菱形,请完成下面的证明过程.
证明:∵四边形
是平行四边形,
∴①_________,
∴
.
∵
平分
,
∴②_________,
∴
,
∴
.
同理可证
,
∴③_________.
又∵
,
∴四边形
是平行四边形.
又∵④_________,
∴四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/efd15766-2de1-4cbf-ac79-5501d689f45f.png?resizew=235)
(1)用尺规完成基本作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)根据(1)中作图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴①_________,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf0f1165b2b24cea8c64ac5e392879d.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
∴②_________,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a259da83ff3f4f7a3af29479cc8b2c0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2d3643a9579f2c693ef86909441e2.png)
同理可证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7e48723871f06a6aeae31a2a1ff79d.png)
∴③_________.
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
又∵④_________,
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,
是四边形
的外接圆,且
为
的直径,延长
交于点E,
,过A作
于点F.
(1)试判断
与
的关系,并说明理由;
(2)若
,
.求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/87a88c6b8f24addf3d1f57bf4c1062a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a598a35e6a4bfb3a5f08b55b70bdc3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/162fc79a-9594-48e5-bb34-5f2ecd408450.png?resizew=98)
(1)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3814e5abe085d954e634f8d923b35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】数学课中,张老师和同学们复习回顾圆与正多边形位置关系时,马伊同学向大家分享了自己设计的一个作圆内接等边三角形的方法,方法如下:
![](https://img.xkw.com/dksih/QBM/2021/4/30/2711065600950272/2711523231481856/STEM/0fe69038939f407aa3e92d0bedd75f7d.png?resizew=120)
①如图,作直径
;
②作半径
的垂直平分线,交
于
两点;
③连结
,那么
为所求的三角形.
张老师认可马伊同学的设计,请您顺着马伊同学的设计思路完成整个过程.
(1)用尺规在原图上作出
;
(2)证明
是等边三角形.
![](https://img.xkw.com/dksih/QBM/2021/4/30/2711065600950272/2711523231481856/STEM/0fe69038939f407aa3e92d0bedd75f7d.png?resizew=120)
①如图,作直径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②作半径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
③连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
张老师认可马伊同学的设计,请您顺着马伊同学的设计思路完成整个过程.
(1)用尺规在原图上作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次