A square pyramid base perimeter of 12 ft and a height of 9 ft, what is the volume?

Volume of pyramid is V = (lwh) / 3.

3

It says it's a square pyramid, so all its sides of its base are the same.

Permiter is 12, so each sides is 3 (12 divided by 3).

Now you know that the length and width are both 3.

Plug it all in the formula.

V = (3*3*9) / 3

V = 81/3

V = 27

The volume is 27ft^3, 27 cubic feet