need help with #'s from pit calculator

[cookoff10]

here are the numbers: Link to BBQ Pit Calculator my opening will be in the shape of a half moon so how would you calculate its area. and on the fire box vent opening are these numbers telling me that a 4.5 in diameter opening is too small? thanks for your imput.

[cookoff10]

the opening from the fb to cc will be a half moon is what I intended to state above.

[Clover Ridge Smokers]

Here is a link to a semi circle / half moon calculator.
http://www.mathopenref.com/segmentareaht.html

[El Gato]

DANG!!!!
I did not know that!!!!!

El Gato

[The Czar]

David smart

[onesquin]

Google is your friend. Search triangle calculator.

[Pete Mazz]

I still like http://www.handymath.com/cgi-bin/arc18.cgi?submit=Entry

As for the intake, yes. It's telling you you'd need almost 2 that size.

[Clover Ridge Smokers]

I have to use these calculators. Remember CRS really stands for Can't Remember Sh**.