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> 如图1所示,长方形内有两个相邻的正方形,面积分别为4和2,那么阴影部分的面积为()A、B、C、2D、-八年级数学
如图1所示,长方形内有两个相邻的正方形,面积分别为4和2,那么阴影部分的面积为()A、B、C、2D、-八年级数学
题目简介
如图1所示,长方形内有两个相邻的正方形,面积分别为4和2,那么阴影部分的面积为()A、B、C、2D、-八年级数学
题目详情
如图1所示,长方形内有两个相邻的正方形,面积分别为4和2,那么阴影部分的面积为( )
A
、
B
、
C
、2
D
、
题型:单选题
难度:中档
来源:不详
答案
A
根据正方形的面积公式求得两个正方形的边长分别是 2,
,再根据阴影部分的面积等于矩形的面积减去两个正方形的面积进行计算.
解:∵矩形内有两个相邻的正方形面积分别为4和2,
∴两个正方形的边长分别是 2,
,
∴阴影部分的面积=(2-
)×
=2
-2.
故选A.
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题目简介
如图1所示,长方形内有两个相邻的正方形,面积分别为4和2,那么阴影部分的面积为()A、B、C、2D、-八年级数学
题目详情
A、
答案
解:∵矩形内有两个相邻的正方形面积分别为4和2,
∴两个正方形的边长分别是 2,
∴阴影部分的面积=(2-
故选A.