I am trying to gain some understanding from this article regarding deriving the volume of an arbitrary pyramid.(adsbygoogle = window.adsbygoogle || []).push({});

"An arbitrary pyramid has a single cross-sectional shape whose lengths scale linearly with height. Therefore, the area of a cross section scales quadratically with height, decreasing from at the base ([PLAIN]http://mathworld.wolfram.com/images/equations/Pyramid/Inline5.gif) [Broken] to 0 at the apex (assumed to lie at a height [PLAIN]http://mathworld.wolfram.com/images/equations/Pyramid/Inline6.gif). [Broken]The area at a height http://mathworld.wolfram.com/images/equations/Pyramid/Inline7.gif above the base is therefore given by"

Can you describe this to me mathematically but easily?

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# B Volume of a Pyramid

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