Five faces (it is a 3 dimensional shape).
A four sided pyramid is a pentahedron.
(penta- means five, -hedron means sides)
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there are 15 edges in a pentahedron
5, that is what the penta part of pentahedron means.
I would say a square-based pyramid but there are many 3 dimensional shapes with 5 sides.* * * * *The generic name is a pentahedron.
Despite the blind answer of many uneducated users of this site, a pentagon is 2 dimensional with 5 SIDES, thus not a solid figure. A pentahedron, though, is a solid figure of five FACES. PENTAHEDRON
It has five faces in all. How many are lateral depends on the configuration of the pentahedron.