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

$\displaystyle \frac{4\sqrt{3}}{3}$\displaystyle \frac{4\sqrt{3}}{3}

$1$1

$\displaystyle \frac{\sqrt{3}}{4}$\displaystyle \frac{\sqrt{3}}{4}