Question

Linda joined cardboard pieces to make a square pyramid, as shown below.

A square pyramid is shown with length of the square base sides equal to 9 inches and the altitude of one of the lateral triangular faces as 6 inches.

If the dimensions of the pyramid are tripled, which statement is true about the surface area of the new pyramid?

It will be three times the original pyramid’s surface area.

It will be one-third of the original pyramid’s surface area.

It will be nine times the original pyramid’s surface area.

It will be one-ninth of the original pyramid’s surface area.