関連ワード:  is root 2 over 2 a rational number    is square root of 2 over 2 a rational number    is square root of 2 divided by 2 a rational number    is square root 2 2 a rational number    is root 2 divided by 3 a rational number    is root 2 a rational number justify your answer    is root 2 a rational number or irrational    is root 2 a rational number justify    is root 2 a rational number why or why not    is root 2 a rational number