The Geometry of Giza (cont.) By Edward G. Nightingale
These three intersecting points seem to suggest the axis of a circle, with the angled Sphinx causeway pointing to circles center. Based on the same logic the angled causeway leading from the Eastern face of The Pyramid of Khufu is extended to the point west where it intersects the East West centerline. These two points are used to determine the radius of the circle.