a=6
H = [tex]4\sqrt3\\[/tex]
[tex]P_p = \frac{a^2 \sqrt3}{4} = \frac{36 \sqrt3}{4} = 9\sqrt3\\V = \frac{1}{3}P_p \cdot H = \frac{1}{3} \cdot 9\sqrt3 \cdot 4\sqrt3 =36[/tex]
