I'm just a little curious with these formulas because I like to understand a formula before I use it. There's no doubt I've been using these since gr3 but I would like a mathmatical derivation of them.(adsbygoogle = window.adsbygoogle || []).push({});

[tex]V_{cone}=\frac{A_bh}{3}[/tex]

[tex]V_{pyramid}=\frac{A_bh}{3}[/tex]

All I would like to know here is why by 3?

And just

[tex]V_{sphere}=\frac{4\pi r^3}{3}[/tex]

With this one I have no clue why it is what it is. There are [itex]4\pi [/itex]radians in a sphere maybe??

Thanks in advance.

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# Formulae derivation

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