1 . 在
中,
.已知
,求a.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9614c1227b3cc831042f254a578b19.png)
您最近一年使用:0次
2022-10-14更新
|
159次组卷
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5卷引用:陕西省安康市宁陕县蒲河九年制学校2022-2023学年八年级上学期期中数学试题
陕西省安康市宁陕县蒲河九年制学校2022-2023学年八年级上学期期中数学试题福建省宁德市2021-2022学年八年级上学期期中测试数学贵州省贵阳市南湖实验中学2022-2023学年八年级上学期期中数学试题(已下线)专题17.1 勾股定理(专项训练)-2022-2023学年八年级数学下册《同步考点解读·专题训练》(人教版)(已下线)江西省抚州市东乡区第二中学2023-2024学年八年级上学期月考数学试题
2 . 如图,
,
分别是
的两条高,点
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/d599cef8-4f7c-4d73-97c3-37cd164e943f.png?resizew=185)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/d599cef8-4f7c-4d73-97c3-37cd164e943f.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637d4c2a9cedf650ac75ee7ec6f8033c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b85e41773c2a1b2e99575c97055637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b02c51ce96d326f33c430cc884ea00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
2022-10-05更新
|
148次组卷
|
3卷引用:陕西省安康市汉滨区2021-2022学年八年级下学期期中数学试题
陕西省安康市汉滨区2021-2022学年八年级下学期期中数学试题(已下线)第2章 特殊三角形(A卷·知识通关练)-【单元测试】2022-2023学年八年级数学上册分层训练AB卷(浙教版)江苏省泰州市兴化市常青藤学校联盟2023-2024学年八年级上学期12月月考数学试题
名校
3 . 欧几里得在《几何原本》中,记载了用图解法解方程
的方法,类似地我们可以用折纸的方法求方程
的一个正根.如图,一张边长为1的正方形的纸片ABCD,先折出AD、BC的中点G、H,再折出线段AN,然后通过沿线段AN折叠使AD落在线段AH上,得到点D的新位置P,并连接NP、NH,此时,在下列四个选项中,有一条线段的长度恰好是方程
的一个正根,则这条线段是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/5484e0c6-9fce-4b32-b9cb-e22136dd8fb6.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f98843c8b72d2569c3ea90b71618e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99606defee81cacc6652482953b6818c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99606defee81cacc6652482953b6818c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/5484e0c6-9fce-4b32-b9cb-e22136dd8fb6.png?resizew=144)
A.线段BH | B.线段DN | C.线段CN | D.线段NH |
您最近一年使用:0次
2022-09-18更新
|
271次组卷
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11卷引用:陕西省安康市岚皋县城关九年制学校2021-2022学年九年级上学期段考数学试卷(一)
陕西省安康市岚皋县城关九年制学校2021-2022学年九年级上学期段考数学试卷(一) 山西省运城市盐湖区2022-2023学年九年级上学期数学第一次月考试题河南省平顶山市郏县2022-2023学年九年级上学期期中数学试题江西省新余市2021-2022学年九年级上学期期末数学试卷浙江省宁波市兴宁中学2022-2023学年八年级上学期数学期末试卷福建省厦门外国语学校石狮分校永宁校区、石狮市永宁中学2022-2023学年九年级上学期期末考试数学试题(已下线)专题22 正方形折叠问题-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(浙教版)浙江省金华市义乌市七校联考2022-2023学年八年级下学期5月月考数学试题江苏省无锡市惠山区阳山中学2023-2024学年九年级上学期10月月考数学试题浙江省宁波市鄞州区兴宁中学2022-2023学年八年级上学期期末数学试题浙江省金华市义乌市绣湖中学2023-2024学年八年级下学期3月学情调研数学试题
4 . 在△ABC中,∠C=90°,AB=3,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f420b659cd0323a3405efc05bbd599.png)
A.24 | B.18 | C.12 | D.9 |
您最近一年使用:0次
2022-09-01更新
|
769次组卷
|
6卷引用:陕西省安康市汉阴县2021-2022学年八年级下学期期末数学试题
陕西省安康市汉阴县2021-2022学年八年级下学期期末数学试题(已下线)第3章 勾股定理(A卷·知识通关练) -【单元测试】2022-2023学年八年级数学分层训练AB卷(苏科版)(已下线)3.1 勾股定理(培优分阶练)-2022-2023学年八年级数学上册课后培优分级练(苏科版)(已下线)17.1 勾股定理(第1课时)(练习)-2022-2023学年八年级数学下册同步精品课堂(人教版)鲁教版七年级上册第三章单元测试数学试题湖南省永州市宁远县哈弗中学2022-2023学年八年级下学期第一次月考数学试题
5 . 问题提出
(1)如图1,在
中,
,
,
为平面内一点且满足
,
为
的中点,连接
,则
的最大值是多少?(提示:取
中点
)
问题解决
(2)如图2,为打造优美环境,提升市民幸福指数,城建部门规划在四边形广场
上修建一条“网红钢琴键盘路”
,已知在四边形
中,
,
,
,
米,
,
为
边的中点,则“网红钢琴键盘路”
最长为多少米?(结果保留根号)
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1300c053fde2be0861a4d128645dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.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/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
问题解决
(2)如图2,为打造优美环境,提升市民幸福指数,城建部门规划在四边形广场
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640f058b479299659893cf524ddf6544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e5282cde10f3985ea9e00d52905e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/566eb008-dea0-460d-96ee-a426532f2aca.png?resizew=392)
您最近一年使用:0次
6 . 如图,在平面直角坐标系中,一次函数
的图象交
轴于点
,交
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/e48493d3-8bef-4a66-8cb6-6bd759cf1a3f.png?resizew=206)
(1)求点
到直线
的距离.
(2)以
为边作正方形
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b098e17fa76c648424e9cadf558cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/e48493d3-8bef-4a66-8cb6-6bd759cf1a3f.png?resizew=206)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
2022-08-31更新
|
60次组卷
|
2卷引用:陕西省安康市岚皋县2021-2022学年八年级下学期期末数学试题
7 . 如图,在
中,
,垂足为
,
,
,
,求
的长.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/52e0c964-9899-4f9c-9f7f-cd53e648dd7c.png?resizew=222)
您最近一年使用:0次
8 . 如图,在
中,
,
,
,求AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://img.xkw.com/dksih/QBM/2022/7/15/3022989324566528/3054110622998528/STEM/b4217019767948b88525712db4fc3a8a.png?resizew=107)
您最近一年使用:0次
2022-08-28更新
|
449次组卷
|
2卷引用:陕西省安康市汉阴县2022-2023学年八年级下学期3月月考数学试题
9 . 如图,已知在
中,
,若
,
,求BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229cba9717ed19f430ba898904feeae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/57fe66f6-f499-48ba-81fe-53da7c15de64.png?resizew=176)
您最近一年使用:0次
10 . 在矩形ABCD中,点E为AD上一点,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cdafc64f87eab118c4309459e68e1a.png)
![](https://img.xkw.com/dksih/QBM/2022/7/20/3026523379146752/3052246310199296/STEM/627250bae8b94dcd9064e5f1506db066.png?resizew=421)
(1)如图①,若
,求CE的长;
(2)如图②,点P是EC的中点,连接BP并延长交CD于点F,H为AD上一点,连接HF,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cdafc64f87eab118c4309459e68e1a.png)
![](https://img.xkw.com/dksih/QBM/2022/7/20/3026523379146752/3052246310199296/STEM/627250bae8b94dcd9064e5f1506db066.png?resizew=421)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e606dc2ed692983f17f94bc4a270e6c.png)
(2)如图②,点P是EC的中点,连接BP并延长交CD于点F,H为AD上一点,连接HF,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27f689e5368bdc2e9c81f30e6bbad3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943f214111eaf2dd86ce23cd80705a80.png)
您最近一年使用:0次