如何计算一个物体的面积

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计算面积，是最简单的计算之一了。我们每天都要做这种几何计算，尤其是在学校几何题中要用到。

方法 1
方法 1 的 3:

平面物体

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    上面这个形状面积=（梯形+矩形+正方形+半圆形+三角形）的总面积
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方法 2
方法 2 的 3:

3D物体

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方法 3
方法 3 的 3:

其他物体

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  1. 1
    如果辨认不出物体中的基本形状，就描个这个物体的轮廓，然后根据轮廓线，通过图表或基本形状的方法尝试计算面积。

小提示

  • 用天平或游标卡尺来测量主要物体的大小。
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警告

  • 不要把表面积和面积的用处搞混了。两者本质一样，但是用法不同。面积是用在平面图形上的，表面积是立体图形上的。
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