为了让学生有时间、有机会充分地了解圆的文化，理解圆的知识，渭南高新区教育文体局组织各校数学组利用暑假开展了一系列关于“圆的认识”实践性作业活动。学生依据所收集的资料，通过绘画、思维导图、手抄报等形式，多方面展示圆的相关知识。

一、探索圆周率

同学们动手把了解到的关于π的知识画成了数学手抄报，用图画和文字记录下自己收获，在交流分享中对π的发展有了更全面的认识，更是对数学历史产生浓厚的兴趣。

二、圆元素之巧手设计

通过对圆的认识学习，进一步感受圆的特征，体会图形的变换，提高学生动手能力和创造能力，学生们用自己最喜欢的方式表达着“内心的圆”，瞧！孩子们画得多有创意啊！

三、圆知识预习思维导图

孩子们根据自己的知识水平、认知程度、生活经验进行了尝试性学习，把知识条理化和体系化，并制作圆的预习思维导图。在预习的基础上拓展了科学性、趣味性和针对性内容，使学习变得灵活生动。

四、花样圆面积公式推导

我们都知道，圆的面积公式为S圆=πr2，那公式究竟是如何的来的呢？让我们跟随孩子们的视角一起来看看他们的推导过程吧。

五、圆说数学文化

在数学上，圆是“正无限多边形”，圆周率是一个无限不循环小数，所以圆同时也代表着无限可能，代表着人类永无止境的幻想和探索！因此，这也引起了学生对圆文化的探究热情。

渭南高新区教育文体局表示，这次数学特色实践活动更是一场探寻“美”的旅程，孩子们在欣赏美、发现美、创作美的过程中，调动学习积极性、提高学习兴趣。在动手动脑中，感受美在数学，美在生活，为自己插上想象的翅膀，用智慧扮美生活，为生活增色添彩。

","gnid":"966113d01f6ad9e15","img_data":[{"flag":2,"img":[{"desc":"","height":"782","title":"","url":"https://p0.ssl.img.360kuai.com/t014244e3438b750a52.jpg","width":"1080"},{"desc":"","height":"978","title":"","url":"https://p0.ssl.img.360kuai.com/t01ac486d973b938f2c.jpg","width":"1467"},{"desc":"","height":"841","title":"","url":"https://p0.ssl.img.360kuai.com/t01093a9d15285e8636.jpg","width":"1200"},{"desc":"","height":"1131","title":"","url":"https://p0.ssl.img.360kuai.com/t0107f501c207e91e88.jpg","width":"1697"},{"desc":"","height":"1426","title":"","url":"https://p0.ssl.img.360kuai.com/t015498a0a8a3db55d7.jpg","width":"2013"},{"desc":"","height":"891","title":"","url":"https://p0.ssl.img.360kuai.com/t018a161d9a2d3fd851.jpg","width":"1200"},{"desc":"","height":"830","title":"","url":"https://p0.ssl.img.360kuai.com/t019475ac1203ec0afc.jpg","width":"1200"},{"desc":"","height":"876","title":"","url":"https://p0.ssl.img.360kuai.com/t01ed20edc864773211.jpg","width":"1200"},{"desc":"","height":"875","title":"","url":"https://p0.ssl.img.360kuai.com/t017e6bd078a63adfd9.jpg","width":"1200"},{"desc":"","height":"873","title":"","url":"https://p0.ssl.img.360kuai.com/t013501510655f7d5ab.jpg","width":"1200"},{"desc":"","height":"842","title":"","url":"https://p0.ssl.img.360kuai.com/t01d06b70fe5182e090.jpg","width":"1200"},{"desc":"","height":"862","title":"","url":"https://p0.ssl.img.360kuai.com/t01f6cd58a98a8f2fb7.jpg","width":"1200"},{"desc":"","height":"854","title":"","url":"https://p0.ssl.img.360kuai.com/t017aafc24f06f13bbd.jpg","width":"1200"},{"desc":"","height":"848","title":"","url":"https://p0.ssl.img.360kuai.com/t010a745ae280022726.jpg","width":"1200"},{"desc":"","height":"846","title":"","url":"https://p0.ssl.img.360kuai.com/t0164f5c479dd099333.jpg","width":"1200"},{"desc":"","height":"1599","title":"","url":"https://p0.ssl.img.360kuai.com/t014f76a4349f810389.jpg","width":"1200"},{"desc":"","height":"1686","title":"","url":"https://p0.ssl.img.360kuai.com/t01458adfbe7f5ea690.jpg","width":"1200"},{"desc":"","height":"1567","title":"","url":"https://p0.ssl.img.360kuai.com/t017e71d402c664e8c6.jpg","width":"1200"},{"desc":"","height":"881","title":"","url":"https://p0.ssl.img.360kuai.com/t01d110278b40fccde6.jpg","width":"1200"},{"desc":"","height":"1136","title":"","url":"https://p0.ssl.img.360kuai.com/t01418546a4f6d743fc.jpg","width":"1704"},{"desc":"","height":"843","title":"","url":"https://p0.ssl.img.360kuai.com/t01821180431efc5243.jpg","width":"1200"},{"desc":"","height":"883","title":"","url":"https://p0.ssl.img.360kuai.com/t01779fc09d9e521cf2.jpg","width":"1200"}]}],"original":0,"pat":"art_src_3,otherc,fts0,sts0","powerby":"hbase","pub_time":1692409860000,"pure":"","rawurl":"http://zm.news.so.com/8ac921f1b95075714d0923788fa596ad","redirect":0,"rptid":"abcc39c0059f65f8","rss_ext":[],"s":"t","src":"渭南青年网","tag":[],"title":"渭南高新区教育文体局组织各校开展数学暑假特色实践作业展

訾琼尹2781五年级上数学多边形面积公式是什么?字母表示 -
夏谦功18611561269 ______ 三角形面积:S=a*h÷2 梯形面积:S=(a+b)*h÷2 平行四边形面积:S=a*h

訾琼尹2781五年级多边形的面积 -
夏谦功18611561269 ______ 设长方形的宽是x厘米,则根据题意知道长方形的长是3x厘米(这样把长等分成3份,长度都是x厘米,符合题意),则长方形的周长公式为2*(x+3x)=72,得x=9.长方形的长为3x=27厘米,宽为x=9厘米,正方形的边长为9厘米,正方形的周长为4*9=36厘米,面积为9*9=81平方厘米

訾琼尹2781五年级图形的变换手抄报,急!!!!!! -
夏谦功18611561269 ______ 这种手抄报呢,其实很简单.既然是图形的变换,你的数学书上应该会有一些欣赏图形吧?你一点点的把它临摹下来,尽量画标准一点咯,然后再上色.再画点花边,画图这个就OK拉!之后文字内容呢,你就写下有图形的面积或者周长…什么的公式,那就OK拉.PS:另外提醒你,这种手抄报一定不要画得太花哦,因为你一画的太花的话就很难看了.额的经验之谈!!!!

訾琼尹2781多边形面积计算公式 -
夏谦功18611561269 ______[答案] 正多边形内角计算公式与半径无关 要已知正多边形边数为N 内角和=180(N-2) 半径为R 圆的内接三角形面积公式:(3倍根号3)除以4再乘以R方 外切三角形面积公式:3倍根号3 R方 外切正方形:4R方 内接正方形:2R方 五边形以上...

訾琼尹2781小学五年级多边形面积 -
夏谦功18611561269 ______ 设正方形边长为x(x+4)(x-3)=xx 解得x=12 所以长方形周长为(12+4)*2+(12-3)*2=50cm

訾琼尹2781多边形的面积. -
夏谦功18611561269 ______[答案] 24*16÷2=192(平方厘米) 答:平行四边形的面积是192平方厘米.

訾琼尹2781多边形面积的计算5、6、7、8 -
夏谦功18611561269 ______[答案] 5.相等,因为它们等底等高 面积=2.5*1.4=3.5 6.正方形和平行四边形面积相等. 正方形边长=32÷4=8 面积=8*8=64 平行四边形面积64 7.周长:(18+15)*2=66厘米 面积18*15=270平方厘米 周长不变,面积会发生变化,面积无论怎么搞,正方形面积...

訾琼尹2781图中相邻两格点的距离都是1,计算这个格点多边形的面积. -
夏谦功18611561269 ______[答案] 16+10÷2-1 =16+5-1 =20 答:这个多边形的面积是20.

訾琼尹2781相邻边长为1的图形的面积为10的多边形的图形怎么画? -
夏谦功18611561269 ______ 长5宽2的矩形(长方形)