remembering formulas

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I am doung gcses unit 3 and my biggest problem is remebering formulas 

so far i have 

circumference of a circle = diddly dum diddly de once round the moon is pie times D

also to fill a whole use pie r squared  ( area of a circle)

any one else know any 

Posted: 03-04-12 17:08 by Buffy