The Granite Plugs
Extending the two lower shafts downward, we notice they intersect immediately below the Queen’s Chamber. From this point a second circle is drawn tangential to the sides of the structure (Ill. 3).
Illustration 3. A second circle is centered at a point where the lower shaft extensions intersect and drawn tangential to the pyramid sides.
Similar to the previous illustration we find more geometrical features within the limits of this circle.
The two ends of the upper shafts rest on the circumference of the inscribed circle. It is also noted that the circle cuts through the descending passage at the exact location of the ascending passage entrance.
We have now been introduced to two geometrically positioned circles and both include the upper and lower shafts within their boundaries.