2022年小升初数学《图形面积》专题总复习 .pdf
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1、学习好资料欢迎下载AOBC图形面积几何图形千变万化,是小学数学基础知识的一个重要方面。解决这类问题不仅需要有扎实的基础知识(即概念要清晰,公式要记准),而且要有敏锐的观察力以及灵活的思考能力,同时要具备空间想象力,能动手操作。图形问题的题型较多,首先来分析相对简单的 圆和体的问题。转化是圆常用到的解题方法,因为小升初中很少单纯的考圆的周长和面积公式,通常要将不规则的组合图形,进行分、合、移、补、转等变形,这就是“静”图“动”想。一、知识点回顾:1、面积单位:平方厘米(2cm)/平方分米(2dm)/平方米(2m)2、基本面积公式:长方形abS正方形2aS梯形2)(hbaS圆2rS扇形3602rn
2、S二、例题精讲:1、求右图中阴影部分的面积。2、图中阴影部分的面积是多少?3、如图:已知三角形ABC 是等腰直角三角形,圆O 的直径是AB,且 AB=2,求阴影部分的面积(取 3.14)学习好资料欢迎下载4、已知右图阴影部分三角形的面积是5 平方米,求圆的面积。5、求图形的体积。6、求下列图形的阴影面积。7、有一种饮料瓶的瓶身呈圆柱体(不包括瓶颈),如图所示,容积是20L。瓶中装有一些饮料,正放时饮料高度为20 cm,倒放时空余部分高度为5 cm,瓶中现有饮料L。文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X
3、10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q
4、3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4
5、H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K
6、3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W
7、7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7
8、T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L
9、4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1学习好资料欢迎下载8、图中阴影比阴影面积小48 平方厘米,AB=40cm,求 BC的长。9、梯形面积是48 平方厘米,阴影部分比空白部分少12 平方厘米,求阴影部分面积。10、如图,梯形绕轴旋转一周后形成的图形的体积是多少?(结果保留两位小数)11、如图,正方形边长2 厘米,两阴影部分面积相差多少平方厘米?12、如图,两个完全一样的直角三角形重叠了一部分,图中阴影部分的面积是多少?三、回家作业
10、:文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3
11、T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X10H6 ZT9R4W7Q3Z1文档编码:CK7T4H3T1U7 HR5L4K3X
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