$\displaystyle \frac{\sqrt{5}}2{}$\displaystyle \frac{\sqrt{5}}2{}

$\displaystyle \frac{2\sqrt{5}}{5}$\displaystyle \frac{2\sqrt{5}}{5}

$\displaystyle \frac{1}{2 }$\displaystyle \frac{1}{2 }

$1$1