Have a look at the image below:
Now, taking the conventional theory of a massive single ramp having been used to build G1, then where exactly was the ramp placed?
Unlikely to have been from the North due to the steep escarpment.
Unlikely to have been from the East again due to the steep escarpment and also possibly the satellites and eastern cemetery may have hindered.
Unlikely to have been from the south since this is where the blocks for G1 were being quarried.
Unlikely to have been from the west since we know early in Khufu's reign, he commissioned the construction of the western cemetery. Also it seems from geologist, Colin Reader's work, that Khafre's causeway was extant in Khufu's time.
So where did the ramp go? Southwest?