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 You must realise that a surd is an \textbf{exact value}, and anything that your calculator spits back at you is only an \emph{approximation 
 In your calculator \(\sqrt{2} = 1.414213562\), but in truth \(\sqrt{2}\) never terminates, it continues forever as it is \emph{irrational}! 
                                                                                                                                             
 Let's round some surds to 3 decimal places:                                                                                                 
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     \section*{Examples}                                                                                                                     
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             \Question[1] \(\sqrt{19}=\)\fillin[4.359]{0.7in}                                                                                
             \Question[1] \(\sqrt{37}=\)\fillin[6.083]{0.7in}                                                                                
             \Question[1] \(\sqrt{161}=\)\fillin[12.688]{0.65in}                                                                             
             \Question[1] \(\sqrt{732}=\)\fillin[27.055]{0.65in}                                                                             
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 Now we shall find the \emph{exact} lengths of the following sides. Realise that unlike before our side lengths are not whole or even        
 \emph{rational} numbers.                                                                                                                    
                                                                                                                                             
                                                                                                                                             
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