Answer: yes, there is that type of theory.
Explanation: it was the first theory that explained about a ramp that was built on one side of the pyramid and as the pyramid grew, the ramp used to move the blocks up to the top.
Hope it helps!
They were called a "patriot"
You are 4.5 feet because there is 12 inchs in each foot so 54 ÷ 12=4.5 which is also 5 if you round it up.