4 faces.
The number of faces on a pyramid is one more than the number of sides of the base.
A triangle has 3 sides, therefore a triangular pyramid has 3 +1 = 4 faces.
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A square based pyramid has 4 triangular faces and 1 square face.
a pyramid where each face is the shape of a triangle
pyramid
There is only one net to a triangular pyramid.
A square pyramid has four triangular faces and one square face. In total, that is five faces.