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  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1 2008-10-14 06:52:35

gmsc
Member
Registered: 2008-10-05
Posts: 11

Pizza formula?

I've just finished cooking a pizza. Assuming it came out perfectly cylindrical, and has a radius z and a thickness of a, what is the formula to figure out its volume?

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#2 2008-10-14 06:56:43

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Pizza formula?

Its volume would be πz²a, unless I'm missing something.
Edit: And after typing that formula out, I've realised what that something is. Nice one. smile


Why did the vector cross the road?
It wanted to be normal.

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#3 2008-10-14 12:45:38

gmsc
Member
Registered: 2008-10-05
Posts: 11

Re: Pizza formula?

mathsyperson wrote:

Its volume would be πz²a, unless I'm missing something.
Edit: And after typing that formula out, I've realised what that something is. Nice one. smile

For those who missed it, the formula above is correct, but the longer version of the formula is: pi•z•z•a

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#4 2008-10-14 16:39:03

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,711

Re: Pizza formula?

So nice! Can I put that on the "Maths is Fun" website so people can easily remember the formula?


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#5 2008-10-15 06:42:48

gmsc
Member
Registered: 2008-10-05
Posts: 11

Re: Pizza formula?

Please do! It's not original with me, however, as evidenced by Mathworld's "Pizza Theorem" entry.

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#6 2008-10-15 10:14:12

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,711

Re: Pizza formula?

OK, I updated my page. Have a look: Spinning Cylinder


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#7 2008-10-15 19:21:08

gmsc
Member
Registered: 2008-10-05
Posts: 11

Re: Pizza formula?

That's great! I like the graphic.

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