七巧板是我们祖先的一项卓越创造,被誉为“东方魔板”,小明让七巧板(如图1所示)中①,②,③三块板块保持不动,将其他板块重新拼成了“锄头”形状(无缝隙、不重复),并将其摆在长方形木板上(如图2所示),则该木板的周长是( )
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714346904199168/2714502320062464/STEM/a51fd65f-a620-47c3-bcc2-ebb6e07752eb.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714346904199168/2714502320062464/STEM/b726ffe8-657f-4cdc-b508-03f419ea6a29.png)
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714346904199168/2714502320062464/STEM/a51fd65f-a620-47c3-bcc2-ebb6e07752eb.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714346904199168/2714502320062464/STEM/b726ffe8-657f-4cdc-b508-03f419ea6a29.png)
A.![]() | B.![]() | C.![]() | D.![]() |
19-20九年级下·浙江温州·期末 查看更多[1]
(已下线)【新东方】【温州】【初三下】【数学】【00079】
更新时间:2021-05-05 14:12:01
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,在四边形
中,
,
,对角线
、
相交于点
,下列结论中:①
;②
与
相互平分;③
、
分别平分四边形
的两组对角;④四边形
的面积
.正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb34d917a073024625616e4edf22016.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431c8bb7b1f97d9cba9e0b4266975204.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/84798f35-ee05-4334-aea2-f7949cc1678f.png?resizew=119)
A.①②③④ | B.①②④ | C.①③④ | D.①④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,将
绕顶点
旋转得到
,点
对应点
,点
对应点
,点
刚好落在
边上,
,
,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/763feae3-e9c9-4829-84fc-fb2a54f7df51.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a9afe4b588fccd34b74b0f765a7c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add445bc017e3127c14ca71ac4c03a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/763feae3-e9c9-4829-84fc-fb2a54f7df51.png?resizew=147)
A.68° | B.70° | C.72° | D.74° |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,已知直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6898d181faf9e6cc9957f3102f8d3d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
与
轴、
轴分别交于
、
两点,
是以
,
为圆心,
为半径的圆上一动点,连结
、
.则
面积的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6898d181faf9e6cc9957f3102f8d3d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86a107aa3fc8f6bbe93e573603ae240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1537d2f0f71aec06db1c7e57aa2bc7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0754b2c5ece72f3f64f156c6a5cb77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703b40a6293ed9e33001e2919379b168.png)
A.![]() | B.6 | C.8 | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在正方形纸片
中,对角线
、
相交于点
,折叠正方形纸片
,使
落在
上,点
恰好与
上的点
重合,展开后,折痕
分别交
、
于点
、
,连接
,有以下结论:①
;②
;③
;④四边形
是菱形;⑤
,其中正确结论的个数有( )
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa1dac01eaf9c9ca11fa1c28c783cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc91db43eea9ba6f29cb5719e26fa34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717126ce58771d1cc5bc1397d2211eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcc1f812f0a219b49352f1a2a325c1a.png)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】如图,正方形ABCD和正方形CEFG中,点D在CG上,已知BC=1,CE=7,点H是AF的中点,则CH的长是( )
A.5 | B.3.5 | C.4 | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在
中,
,D为
上一点,以
为边,在如图所示位置作正方形
,点O为正方形
的对称中心,且
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd66c0ed37e30bbde1618bb169b71c56.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/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e001897d70ceee81406f3b01d284b83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/2ede0b74-bcc2-48d5-a1e9-3509681a5a26.png?resizew=153)
A.![]() | B.5![]() | C.5![]() | D.8![]() |
您最近一年使用:0次