Question 1036732
If you walk around a square table you will go up one side, follow the edge to the other side, go down the other side, and follow the other edge back to the beginning. You walked all four sides of the table, that is the perimeter. If you pyramid has a base of length 4, its perimeter is 4+4+4+4 = 16. 
See what i mean? The perimeter cannot be 8. Am I missing something?