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I'm unsure of the pythagoras thereom? Any help? Thanks!
http://en.wikipedia.org/wiki/Pythagorean_theorem this will give you good explanation
hypothenuse square = base square + perpendicular square
Thank-you, has helped alot :)
pythagoras theorem applies to a right angled triangle i.e in which one angle is equal to 90 degrees.. hypotenuse ^2 = prependicular^2 + base^2..