In the pyramids the bases of each are large at the bottom and as they go higher it gets smaller.
all the bases of a pyramids are polygon
no
There are pyramids of various sizes and descriptions in many countries. However the best known are in Egypt
The Egyptians built they pyramids in different sizes because the wanted to have a little variety. It'd be boring to see the same pyramid in three different places.
Population pyramids
Population pyramids
There is no "normally." They're of many, many different sizes. You can find a list of Egyptian pyramids, which also gives their height and the size of their bases, in the Related Links section. As you'll see from the list, they range from around 7 meters up to nearly 150 meters.
yes
No, none of them do.
Pyramids are constructed from triangular shapes and can have square or triangle bases
cones have round bases
All pyramids have only one base.All pyramids have only one base.All pyramids have only one base.All pyramids have only one base.