Mary Koerber Geometry in two dimensional and three dimensional ...

ABC. The legs of DABC are the height of the pyramid and the apothem 756of the base. Theheight of the pyramid is 481 ft. The apothem of the base is or 378 ft. You can usePythagorean Theorem to find the slant height.l 2 = 481 2 + 378 2l = (481 2 + 378 2 )l = 611.75567Now use the formula for the lateral area of a pyramid. The perimeter of the base isapproximately 4 * 756, or 3024 ft.L.A.= 3024*611.755672=924974.57. The L.A was about 925,000 ft 2 .2Koeber – Page 22