Because they loose their shapes like pyramids.
No. There is no population there to build pyramids.
That is a very broad question. There is a lot of data on the pyramids, such as measurements, age, ownership, etc as well as photos, diagrams, maps, videos at Talking Pyramids: See Related Links
they are not sometimes prisms
sphinx, menkaure, Khufu are the three pyramids of Giza
The Sphynx
they put the bodies of pharaohs and their belongings and sometimes their cat inside the pyramids
Afghanistan has a growing population People live longer in Puerto Rico than in
Population pyramids
Population pyramids
There is no certain size a pyramid has to be. In Egypt many pyramids are different in size. Sometimes the pyramids are a size chosen by the pharaoh the pyramid is for.
limestone
blo-job