Why did the ancient Egyptians use the pyramid shape?

Egyptologists have developed many theories about why the tombs of the early pharaohs were built in the pyramid shape. Here are three different ideas:

  1. The pyramid represented the first land to appear at the beginning of time- a hill called 'Ben-Ben'.

  2. The pyramid had sloping sides so that the dead pharaoh could symbolically climb to the sky and live forever.

  3. The pyramid represented the rays of the sun.