A rectangular pyramid has five faces. Sides are the same things as faces.
A pyramid with a triangular base has 4 faces. This is the more common type of pyramid in mathematics, as it is a platonic solid.
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Faces = sides = 5. Edges = 8
The sides of a pyramid are known in geometry as faces.
If the base is a polygon with n sides, the pyramid will have n+1 faces. Triangle base (3 sides) gives 5 faces, Quadrilateral base (4 sides) has 5 faces, etc.
There are 4 faces but 5 sides (don't forget the bottom).
A pyramid does not need to have any equal sides. A REGULAR pyramid has as many equal sides as the number of sides on the base. So, a triangular pyramid (tetrahedron) will have 3 equal faces, a square based pyramid will have 4, etc.