A World Of WTF
A Site Dedicated To Me Trying To Remember Stuff.
Wednesday, 20 July 2011
The Perimeter Of A Circle
Use this rule:
π x d
OR
π x 2r
Example:
The diameter of the circle is 4cm.
Pi multiplied by 4 is 12.56637061.
Round off to one decimal and the answ
er is...
12.6cm.
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