Square Pyramid

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A square pyramid? Theres no such thing. A pyramid is a 3 dimentional triangle. The base is a square, but you can't say the whole thing is a "square pyramid"

Use the surface area formulae for a pyramid, i.e. 1/2pl, where p is the perimeter of the square pyramidal base and l is the length of a leg.

Set the surface area equal to the area of the piece of paper and solve for the product of pl.

Hint: the easiest solution is to set the base equal to a 12 inch square. Solve for the perimeter of this square and solve for l.

Rap