With two legs extending upward at the Khufu Pyramid slope of 51 ° 50’40” and intersecting outside the architectural framework, a triangle escapes to roam in the expansive universe while clouds of mist in irregular forms sprayed from the steady triangle float and gradually dissipate in the wind . When night falls, the two slanted legs at sides , with the aid of lighting, delineate the contour of an implicit pyramid in the center to echo the triangle above . Etched on steel plates attached to the big wall are Goff pyramid slope and lengths of base sides to reveal actual scale and exhibit the precision achieved by humans.