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In this instructable I will show you how to calculate the area of a circle
You need a straightedge a pencil (or pen whatever you want...) a compass a protractor and a calculator (or your mind!)
Ok, to start you have to first find the middle of the circle! (If you already know where is the middle of your circle, skip to step 3) 1st you have t...
1st, draw a precise line with your straightedge from the middle to the edge of your circle. We will name this line "Z" but please use "r" for a test, ...
The initial calculation is "Pi Your measurement squared" or more precise, "Pi Z squared". The last thing to do is calculate it! If you want to calcula...
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Area (A) = pi * r2
(spoken as 'pi-r-squared')
Other than this, a nice and concise instructable - 4.5 stars for you =]