Area of a Circle

In this instructable I will show you how to calculate the area of a circle

Step 1 What You need

You need a straightedge

a pencil (or pen whatever you want...)

a compass

a protractor and a calculator (or your mind!)

Comments

[cyberpageman]

Uh, are you saying the area of a circle is πr^2?

[bassclarinet23]

Yes, that is the common equation.

[meh301]

yes

[kwah]

More commonly, 'Z' (as you have called it) is given the letter 'r' for 'radius'.

Area (A) = pi * r²
(spoken as 'pi-r-squared')

Other than this, a nice and concise instructable - 4.5 stars for you =]

[meh301]

sorry about the unknown letters. The unknown letters in front of the examples in step 4 is the sign "pie" and the letters after the examples is a mini 2 (for the square root)

[meh301]

Ok I fixed the problem