(drawn with base edge length 1 and height 2)

face count | 5

volume | 1/4 sqrt(3) h s^2≈0.433013 h s^2 lateral surface area | 3 h s base area | (sqrt(3) s^2)/4≈0.433013 s^2 surface area | 1/2 s (6 h + sqrt(3) s)≈0.5 s (6 h + 1.73205 s) (assuming base edge length s and height h)