it's sides and the answer is a nonagon
A nonagon has 9 edges.
Assuming that demination is meant to be dimension, the answer is a triangular prism.
A rectangular pyramid.
Not any geometric figure.
A tetrahedron.
The edges are the lines that form the geometric figure, such as the lines of a square. For instance, a triangle is made up of three edges, the length of the edges added together equals the perimeter.
a nonagon has 9 edges
A square is a polygon because it is a closed geometric figure with line segments and no curved edges
A cube
A pyramid with a square base.
It is a triangular prism
cuboid