I was wondering if it was possible (just out of curiosity) to show that the circumference of a unit-circle is 2(pi) WITHOUT using the rule C = 2(pi)r?(adsbygoogle = window.adsbygoogle || []).push({});

Is it possible to take a unit-sphere (a sphere with r=1) and triple integrate it. Something like...

SSS sqrt(x^2 + y^2 + z^2)dxdydz = 2(pi)

I thought this might be an interesting little problem. Anyone more than welcome to add to the calculation. Any help would be great too!

I'll post back with anything I can find.

Cheers.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Using Triple Integrals

**Physics Forums | Science Articles, Homework Help, Discussion**