Question 340203
The formula for the volume of a pyramid is V = 1/3 Bh.

Since the base is an equilateral triangle, we find its area via the formula

{{{A = s^2*sqrt(3) / 4}}} and with the side being 4 inches, the base area is

A = 4^2 * sqrt(3) /4 = 4 * sqrt(3)

and the volume is

V = (1/3)(4*sqrt(3)(3) = 4*sqrt(3)