Don:
Not so fast...!
Think about the situation.
You began with the cross section of the QC that is built with right-angled walls and a triangle ceiling. From this you converted to a circle then compared it to the granite chamber in G3.
You are following perfectly when questioning the granite chamber being 40% in width of the circle, but remember…the length is 100% perfect.
Don’t look for the missing section yet; observe what you are given…the perfect fit…the “length” of the chamber…259 inches.
Do likewise with this measure as you did with the QC…shape the length into a circle and the result is a circle with a diameter equal to 259/pi = 82.44 inches.
That’s the diameter…now divide by 2 to find the radius and you get…41.22 inches or 2.00 Rc…!
From Petrie: “…The granite lintel of the south door of this chamber is lying on the floor…and the width between the square ends, which rested on the jambs, varies from 41.23 to 41.35…”
Now I want you to travel mathematically in reverse and give me the perimeter of the QC using the lintel stone as a standard of measure.
Thanks for hanging in…there’s more, but I think it wiser to post a new topic.
Best.
Clive