A pyramid is a generic term which is used to describe a 3-dimensional shape that consists of a polygonal face (normally called the base) with n sides, and n triangular faces (called lateral faces) attached to each edge of the polygon and meeting at an apex above the base.
A pyramid, whose base is an n-sided polygon has n+1 faces, n+a vertices and 2n edges.
Only the tetrahedon has 4 axes of symmetry. Most pyramids have none.
The line joining the apex to the centre of the square base of a right pyramid is an axis of symmetry. Not sure what the other three are!
A square has 4 axes of symmetry.
4
4
4
The square.
2 or 4
4.
Rhombus
A rectangle has 2 axes of symmetry.
a rectangle has 2 axes of symmetry
There are infinitely many axes of symmetry in mathematics.