None. A pyramid is defined as a structure with a square base and lines from the corners of that square coming together at a single point above or below the base level. If it has 5 sides, it's no longer a pyramid.
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A rectangular pyramid has five sides
A Mayan pyramid has five sides, including the rectangular base.
no it has 4 sides
How many sides does a square based pyramid have... it has five including the base !
Pentagonal pyramid because a pentagon has five sides and then you have the base.