vertexes
One whose boundaries are straight lines.
... are straight lines where two planar surfaces meet.
it if called a edge for a 3D shape
Using the definition for corner of the place at which two converging lines or surfaces meet. There are 30 edges or corners to an icosahedron. * * * * * Normally, a corner of a solid shape is understood to be a vertex - not an edge! An icosahedron has 12 vertices.
no they don't have solid surfaces their surfaces are composed of gaseous material
Angle is a space between two lines or surfaces that meet at one point, which you measure in degrees.
Venus and Mercury also have solid surfaces.
A rhombus is a quadrilateral. It has four sides. We usually think of edges as the line along which two surfaces of a solid meet.
No, "corner" is not a preposition. It is a noun that refers to the point at which two lines or surfaces meet. Examples of prepositions include "on," "in," "under," and "between."
Epithelial tissue lines bodily cavities/surfaces.
A prism
A cone