surface area=area of the base+4*[area of one lateral triangle side]
area of the base=b² b is the side length of the square b=14 cm area of the base=14²-----> 196 cm²
area of one lateral triangle side=b*h/2 b is the side length of the square b=14 cm h is the height of the lateral triangle side h is equal to the slant height h=15 cm
area of one lateral triangle side=14*15/2----> 105 cm²
