为落实“双减”政策中减负增效的实践作业要求，探索实现数学新课程标准中培养学生创新精神和实践能力的这一重要目标之路，渭南高新区第一小学六年级数学老师结合本学期“圆柱和圆锥”教学内容，设计了“玩转柱锥”为主题的实践作业活动。

活动一：滚一滚

利用滚动法求圆柱的侧面面积，学生通过观察滚动所形成的图形，进一步了解圆柱侧面的特性。

活动二：剪一剪

学生利用现成的圆柱模型，沿着不同方向将侧面剪开，观察比较展开图的异同点，并体验圆柱侧面积、表面积计算公式的推导过程。

活动三：切一切

学生按不同方式将生活中的“圆柱”和“圆锥”切开，探究截面，了解“截面”的产生过程，体会“面源于体”。

活动四：拼一拼

我们能把一个圆采用“化曲为直”的思想方法推导面积计算公式，同样，让学生用转化思想，通过动手实践，推导圆柱体积计算公式。

活动五：做一做

学生在了解了圆柱、圆锥特点之后，制作圆柱与圆锥创意作品，提高学生的实际操作能力，让学生充分参与到“做数学”的活动中。

活动六：画一画

圆柱与圆锥知识点多而杂，但知识点之间不是孤立的，让学生从多维度对圆柱和圆锥的知识点进行整理，找出知识点之间联系，绘制思维导图，编织自己的知识网。

此次实践活动中，同学们不断在做中学，学中思，思中悟，进一步理解了圆柱和圆锥的特征，发现了两者之间的联系和区别，发展了空间想象能力、逻辑推理能力，体会了数学的应用价值，让学生得以跳出课堂，放飞手脑，去探索更广阔的数学世界!

撰稿：冯琳

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令枫黛1932长方体侧面展开图是什么
向河荀13638194264 ______ 长方形或正方形

令枫黛1932立体图形的侧面展开图与表面展开图有什么区别 -
向河荀13638194264 ______ 立体图形的表面展开图比侧面展开图多上下底面.

令枫黛1932圆锥的侧面展开图是什么?其什么的长度等于圆锥底面圆的周长 -
向河荀13638194264 ______ 扇形.其弧长和底面周长相等.

令枫黛1932棱柱的侧面展开图是什么 -
向河荀13638194264 ______[答案] 我认为是(长方形),因为每个侧面都是长方形,所以我认为是长方形.

令枫黛1932圆锥的侧面展开图是什么图形与原来的图形有什么关系 -
向河荀13638194264 ______ 小傲kf嘞:您好.圆锥的侧面展开图是一个扇形,扇形的半径长等于圆锥的母线长(圆锥斜面顶点到底面的长),扇形的弧长等于圆锥底面的圆周长.祝好,再见.

令枫黛1932圆柱体斜切一刀的侧面展开图是什么一个圆柱体,中间斜切一刀,然后将侧面其展开,那他下底是直线,可它的上端也是两条直线吗?即展开图为2个梯形.或... -
向河荀13638194264 ______[答案] 下底为直线,上边是曲线. 因为在圆柱状时上边各点的投影为直线,在展开时上边各点在水平方向要平移不等的长度,直线就成为曲线了.

令枫黛1932思考!圆锥的侧面展开图是什么图形?如何计算圆锥的侧面积?如何计算圆锥的全面积?数学书113页圆锥的侧面展开图是1个扇形.设圆锥的母线长l.底面... -
向河荀13638194264 ______[答案] 圆锥的侧面展开图是扇形.要想计算计算圆锥的侧面积需要知道圆锥的体面周长和母线长,利用母线长与底面周长的积的就是它的侧面积,圆锥的全面积就是它的底面积再加上它的侧面积.如果知道了圆锥的半径和高,或者说知道圆锥底面的一些条件...

令枫黛1932圆柱的侧面是一个什么面 他的侧面展开图是什么
向河荀13638194264 ______ 侧面就是圆柱的高,圆柱展开就是一个长方形.

令枫黛1932圆锥的侧面展开图是什么,圆锥底面圆的周长与侧面展开图的什么相等 -
向河荀13638194264 ______[答案] 亲~ 圆锥的侧面展开图是扇形图 圆锥底面圆的周长与侧面展开图的弧长相等. 求采纳···

令枫黛1932侧面展开图是长方形的几何体有什么;圆锥的侧面展开图是什么急急急急 -
向河荀13638194264 ______ 侧面可以展开成一个长方形的几何体有( 正方体、长方体、圆柱、棱柱 ). 圆锥的侧面展开后是一个( 扇形 ). 答题不容易,望采纳,谢谢!!! 如有不懂,可追问!不采纳的,今后不再回答!