It has a square base. Attached to each side of the base is a triangular face and these meet at an apex that is not in the plane of the square base.
The apex need no be above the base: it can be to a side.
The triangles can be scalene, acute, right or obtuse angled.
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Square base with 5 sides. Formula for area: 1/3(area of the base)(height)
A square pyramid.
A square based pyramid.
1. Base is a square 2. The apex is usually directly above the centre of the square (ie if you drop a perpendicular from the base of the square passing through the apex, it hits the square in the middle)
A square pyramid has 1 more vertex than a triangular pyramid. A square pyramid has 5 vertices, and a triangular pyramid has 4 vertices.