A pyramid is a generic term used to describe a polyhedron with a polygonal base and a number of triangles rising from that base to meet at an apex. A pyramid whose base is a polygon with n-sides (or vertices) has n+1 faces, n+1 vertices (corners) and 2n edges, where n >= 3.
1
Only the four corners of the square base will have a right angle, one in each corner.
6
4
a prymaid has 4 sides
Five.
faces: 1 square base + 4 triangular sides = 5 faces corners: 4 round the square base and one at the top where the sides meet = 5 corners edges: 4 around the square base and 1 between each of the 4 sides = 8 edges
None but it has a pair of parallel circular edges
5 flat surfaces.
A pentagonal pyramid has 6 vertices.
4 triangular lateral faces
a cube