$P=h^2$P=h^2

$P=h^2\sqrt{2}$P=h^2\sqrt{2}

$\displaystyle P= \frac{h^2\sqrt{2}}{2}$\displaystyle P= \frac{h^2\sqrt{2}}{2}

$\displaystyle P= \frac{h^2\sqrt{3}}{4}$\displaystyle P= \frac{h^2\sqrt{3}}{4}