如图,在平行四边形
中,对角线
交于点O,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/11/28/3119253385994240/3158527304974336/STEM/2b8ad8951b654dc6afba162f39ad80fc.png?resizew=184)
(1)求
的度数;
(2)设
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://img.xkw.com/dksih/QBM/2022/11/28/3119253385994240/3158527304974336/STEM/2b8ad8951b654dc6afba162f39ad80fc.png?resizew=184)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c499d3ef329f85e59fd72dec6f453bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
更新时间:2023-01-22 22:23:09
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】笔直的河流一侧有一营地C,河边有两个漂流点A,B,其中
.由于周边施工,由C到A的路现在已经不通.为方便游客,在河边新建一个漂流点H(A,H,B在同一直线上),并新修一条路
,测得
千米,
千米,
千米.
的形状,并说明理由;
(2)求原路线
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccf45683bb1c5696fb46870108488e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288dc67e770a5bc4ad25d685734b95d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6629fbe2eef7def1afa88acbbabdb10.png)
(2)求原路线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,
中,
,
,
边上的中线
.
![](https://img.xkw.com/dksih/QBM/2022/11/24/3116437347573760/3117061529059328/STEM/0280f154ae344b3e9f97735ea872222d.png?resizew=160)
(1)判断
是何种特殊三角形?
(2)对(
)中你所给的结论进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f732fce92dd33b28a254c2b1ae2261e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b8a4b0e72a4de1da975168b243a325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf05aaa351239448a9ab0e048f76faf.png)
![](https://img.xkw.com/dksih/QBM/2022/11/24/3116437347573760/3117061529059328/STEM/0280f154ae344b3e9f97735ea872222d.png?resizew=160)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)对(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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适中
(0.65)
【推荐1】在平面直角坐标系中,反比例函数
的图象如图所示.
(1)说明“此函数图象关于原点对称”的过程如下:
![](https://img.xkw.com/dksih/QBM/2023/7/31/3292828741427200/3299087139151872/STEM/8dd36c3f077f4953bd9e9972ce4354a8.png?resizew=28)
在函数
的图象上任取一点
,
则点A关于原点O的对称点
( , ).
∵ ,
∴ .
∴反比例函数
的图象关于原点对称.
请在横线上补充说明过程.
(2)在(1)的基础上,解答下列问题.
①分别过点A,
作y轴的垂线段,垂足分别为B,C,连接
.试求四边形
的面积;
②当
时,以线段
为边长作正方形
.则P,Q两点中是否存在反比例函数
图象上的点?若存在,请求出坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a5f6a2be062048498d9826013dc0d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/18/99eff9e0-fed1-484f-9479-b64521d832ae.png?resizew=160)
(1)说明“此函数图象关于原点对称”的过程如下:
![](https://img.xkw.com/dksih/QBM/2023/7/31/3292828741427200/3299087139151872/STEM/8dd36c3f077f4953bd9e9972ce4354a8.png?resizew=28)
在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a5f6a2be062048498d9826013dc0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b167280714cd15a3b6a9dcdbe49c049e.png)
则点A关于原点O的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
∵ ,
∴ .
∴反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a5f6a2be062048498d9826013dc0d9.png)
请在横线上补充说明过程.
(2)在(1)的基础上,解答下列问题.
①分别过点A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137ee033d397f141fe9e777f4ec339e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fae69632dcd6e93c9a34b7c36397d0.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8243644e7bcecd9dfdc2aacc08b310b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a5f6a2be062048498d9826013dc0d9.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,在
中,点
是
的中点,连接
交
延长线于点
,
,
,
.
(1)求证:
;
(2)连接
,请分别求出
的面积和周长,并写出你的求解过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2d3643a9579f2c693ef86909441e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4ea9ffbbabd6b5c90e4678c15bb1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a028fd5b281ef168702a803baca6e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/8bc8e1d3-2006-4fdc-9524-7b89710ef7bf.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74f77f4db543760c2e583c54df8a2a2.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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适中
(0.65)
【推荐1】已知边长为 3 的正方形
中, 点
在射线
上, 且
,连接
交射线
于点
,若
沿直线
翻折, 点
落在点
处 .
(1)如图1,若点
在线段
上,求
的长;
(2)求
的值;
(3)如果题设中“
”改为“
”, 其它条件都不变, 试写出
翻折后与正方形
公共部分的面积
与
的关系式及自变量
的取值范围(只要写出结论,不需写出解题过程) .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/a55c3f663b6b205bb0d541a72e4d4759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(1)如图1,若点
![](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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cabf667b7bb7b692a3627883c2cf022.png)
(3)如果题设中“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55c3f663b6b205bb0d541a72e4d4759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240c0641be85d7d6551fcc835857ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,已知四边形
和四边形
为正方形,点
在线段
上,点
在同一直线上,且
,连接
,并延长
交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670763264131072/2670800588996608/STEM/362b31bd031a429899bff821188017f6.png?resizew=118)
(1)求
的值.
(2)求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d59b399a569ab257ac0e2333e22d11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a835fd78d5e0634705a4272f4ebd2a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4e307d2815bce1f83efe90dbfb2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670763264131072/2670800588996608/STEM/362b31bd031a429899bff821188017f6.png?resizew=118)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70f7425df55b966de10dba3b475ad6f.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
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