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1
规则多边形面积的一个计算公式是:面积=1/2 x 周长 x 边心距。这个公式的解释如下:
在这种直角三角形里,60°对边是30°对边的√3 倍。如果60°对边长度为10√3 ,则30°对边长 x = 10。
上面这个x是三角形底边的一般长度。因此底边长度为20, 20乘以6就是正六边形的周长120了。
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4
将边心距和周长代入公式,如果你用的是上面的“面积=1/2 x 周长 x 边心距”,就相应代入:
面积= 1/2 x 120 x 10√3
面积= 60 x 10√3
面积= 600√3
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5
简化答案。有的题目要求你写出答案的小数形式。用计算器算一下,√3 x 600 = 1,039.2,这就是最终答案的一种形式啦。
部分 2
部分 2 的 3:
用其他公式计算规则多边形面积
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1
计算得到正三角形的面积。用下面这个公式:面积= 1/2 x 底边x 高。