For example, \(\sqrt 4 = 2\) is not a surd. However \(\sqrt 5\) is a surd. If you use a calculator, you will see that \(\sqrt 5 = 2.236067977...\) and we will need to round the answer correct to a ...

sqrt{3} = 1.732050807568877\) ... \(\pi = 3.14159\) ... Roots that cannot be written as exact decimals are called surds. Leaving an answer in surd form means the answer is exact. This square has ...