[surface area of the pyramid]=area of the base+4*[area of one lateral triangle] area of the base=14*14------> 196 cm²
area of one lateral triangle=b*h/2 b is the length side of the square b=14 cm h is the slant height h=15 cm area of one lateral triangle=14*15/2-----> 105 cm²
[surface area of the pyramid]=196 cm²+4*[105 cm²]-----> 616 cm²
