多边形面积+五年级

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多边形面积+五年级

来源：baiyundou.net 日期：2024-07-16

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巫实饱4282五年级上册的数学第二单元多边形的面积高是什么关系 -
殳峰翟15546462438 ______[答案] 就小学五年级学到的多边形的面积,只是包含长正方形、平行四边形、梯形、三角形等,所以面积和高成正比,即高扩大到原来的n倍,面积也扩大到原来的n倍,反之缩小也是一样.

巫实饱4282五年级多边形的面积 -
殳峰翟15546462438 ______ 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

巫实饱4282小学数学五年级上册之多边形面积练习15第8大题的解答一个大的平行四边的面积是48CM2.A,B是上,下两边的中点.你能求出图中小平行四边形(阴隐部分)... -
殳峰翟15546462438 ______[答案] 小平行四边形的底边长等于大平行四边形的底边长的一半, 小平行四边形的高等于大平行四边形的高所以小平行四边形的面积等于大平行四边形的面积的一半即48/2=24平方厘米

巫实饱4282小学五年级数学多边形的面积题(列式计算)
殳峰翟15546462438 ______ 16x2x16)/2)x2相当于两个三角形的面积求和/2、设长X宽Y列方程就oK

巫实饱4282小学五年级数学多边形的面积请详细解答,谢谢! (2 11:24:21) -
殳峰翟15546462438 ______ S(EFG)=1/2S(DFG),所以S(DFG)=8*2=16平方米, S(DFG)=1/2 DG*FP (P是F向DB的垂足) =1/2(2/3DB)*(2/3CQ) (Q是C向DB的垂足) =4/9(1/2DB*CQ) =4/9S(CDB) =2/9S(平行四边形ABCD) 即S(平行四边形ABCD)=9/2S(DFG)=9/2*16=72平方米

巫实饱4282一五年级算多边形面积题,急急急急急急急急急!!!!
殳峰翟15546462438 ______ 解:设原来正方形的边长是x平方厘米,原来正方形的面积是x²平方厘米 (x+3)²=x²+39 (x+3)X(x+3)=x²+39 x(x+3)+3(x+3)=x²+39 x²+3x+3x+3X3=x²+39 x²+6x+9=x²+39 6x=x²-x²+39-9 6x=30 x=5 ∴x²=25 答:原来正方形的面积是25平方厘米

巫实饱4282Y5《数学报》——多边形的面积整理和复习(一)上的“智慧小博士”实验小学五年级同学在进行广播操表演时,围成了一个直角三角形,已知每条边上的... -
殳峰翟15546462438 ______[答案] (16x2)x(21x2)

巫实饱4282五年级数学上册第5单元测试题【多边形的面积】 -
殳峰翟15546462438 ______ 一、填空:18分 1、4.08 m2=(408)dm2 6200平方米=(0.62)公顷 90平方厘米=(0.009)平方米 4.3公顷=(43000)平方米 5平方米8平方分米=(5.08)平方米=(508)平方分米 2、平行四边形的面积是48平方分米,底是12分米,高是(4...

巫实饱4282小学五年级数学多边形的面积请详细解答,谢谢! (2 11:24:21)有一块平行四边形菜地,DE=EF=FC,GB=1/3BD,三角形GEF中的是小白菜,面积是8... -
殳峰翟15546462438 ______[答案] S(EFG)=1/2S(DFG),所以S(DFG)=8*2=16平方米, S(DFG)=1/2 DG*FP (P是F向DB的垂足) =1/2(2/3DB)*(2/3CQ) (Q是C向DB的垂足) =4/9(1/2DB*CQ) =4/9S(CDB) =2/9S(平行四边形ABCD) 即S(平行四边形ABCD)=9/2S(DFG)=9/2*16=72...

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