1. Feb 11, 2015 #1

   carcosachild

   

   Hello :)
   I had a question , i recently red a lot about black holes and i had a question about the Schwarzschild
   Radius . How does that come that π is not in the equation ? The black hole is a sphere so instinctly one could think that Pi should be in the equations.. ?
   P.S: I'm french and 16 so sorry for the eventuals faults :)

    

   carcosachild, Feb 11, 2015
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3. Feb 11, 2015 #2

   mathman

   

   Science Advisor

   Gold Member

   In geometry, you start with radius r. π comes in to get circumference, area, volume, etc.

    

   mathman, Feb 11, 2015

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