noting
the perimeter of the great pyraimd of gisa is 921.6
1/2 times the perimeter of the base times slant height
LA=1/2ps
921.68
Surface Area= 1/2perimeter x slant height + B * * * * * Perimeter = perimeter of base. B = Area of base.
The Great Pyramid of Giza id 440 royal cubits (ie 230.4 metres or 755.9 ft) long at each of the four sides of its base (a royal cubit measures 0.524 metres). Thus its perimeter is 921.6 meters or 1760 royal cubits.
Surface area of any pyramid is 1/2Pl + B; where P=perimeter of the base, l=slant height and B= Area of the base.
If the base of the pyramid is a square, and the length of each side is 740 feet long, then the total length of the perimeter is just 4 x 740 feet, which is 2960 feet.
It is 125 square units.
That is not true: for a pyramid, for example.
It is the lateral area (which is 1/2 the perimeter multiplied by the slant height), plus the area of the base.