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Why we take value of pi to find the area of circle?

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Hi

the formula of area of circle is pi R square

where R is radius of the circle
pi value 3.14

Posted on Jul 13, 2010

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What formula do you use to calculate cylinder volumes


Volumes are any three dimensional measurement...

I Seriously doubt that I could get Pi ("pie") to print...
But I'll just GIVE YOU the number (much simpler)
Pi = 3.14159

Inches, feet, yards or meters.. all the dimensions need to be in the same values... So if you have an inch "ruler"...
That is just fine...!!

Your first step would be to determine the diameter of the inside of your cylinder in inches...
CONVERT that to the RADIUS by DIVIDING by 2...
Multiply that RADIUS by itself and then by 3.1416 = area of circle in INCHES... (radius "squared" x Pi = (square inched)

Then MULTIPLY the height (in inched) by the AREA...
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But I'll just GIVE YOU a REFERENCE (much simpler)
mathematical constant ?
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(pi)R squared (Fixya won't let me use the sign for Pi)

Area of a circle=pi*radius^2 or pi times radius times radius

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so in my example 100*pi=100*3.14 or 314 square inches

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