# Geometry Question

Discussion in 'Science Fiction & Fantasy' started by Kjev, Aug 13, 2007.

1. ### KjevMember

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Does anyone know the formula to determine the perimeter of a circle?

This would be so handy for designing things like Gun barrels, wheels, engines, and anyother cylinders.

K'Jev
2. ### johnflys2Member

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Dia. of circle

I believe the formula is 2 x pi x radius. ( pi = 3.14 )

If I'm wrong, somebody please correct me.

John
3. ### dansls1Member

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The circumference is pi times the diameter (or pi times the radius times 2).
4. ### johnflys2Member

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I've posted this once but it didn't show, so here goes again.

Thanks dansls1, that's a better way of saying it.
Here is a site to speed up the math..............Circumference of a Circle

John
5. ### blueeyedbearMember

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Of the two equations given above, pi X diameter is the correct one for the circumference of a circle.

And if you're interested, pi x (radius squared) = area of circle.

pi = 3.1417
Bob
6. ### dansls1Member

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Therefore they are all correct

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8. ### KjevMember

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Ermmm.....

Did I mention I posted this question since I SUCK at math?

Now History, English, Spanish, or Arabic, that's a different story.

K'Jev
8)

PS: NO WORD PROBLEMS! If God intended numbers to be mixed with letters, we'd be speaking Algebraic. They should stay in separate classrooms where they belong! :thumb:
9. ### 72BMWR75/5Member

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Pie are round. Cornbread are square.
10. ### TexasTubaManMember

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3.14159265358979

to 14 places
11. ### MillenniumfalsehoodActive Member

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I know a guy who can name them off to the 200th place. Shall I give him a ring?
12. ### AmazyahSenior Member

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Noooo, let's just have some of that cornbread!
I hope it's sweet!:twisted:

Russell

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