If you mean a tetrahedron then it is a triangular based pyramid having 4 faces, 6 edges and 4 vertices.
Pentagon
A polygon is a shape with these characteristics: •At least 3 sides •No curved edges •No crossing edges •Closed edges; all edges MUST connect at a corner.
Edges are one dimensional objects where two planes meet.
It is an octahedron which is one of the Platonic Solids having 8 equilateral triangular faces and 12 edges.
Rough Edges was created in 1970.
It can mean to clean rough edges, or in 'proper or sound condition'.
A belt sander is the name for a machine used for removing rough edges.
sand paper
Deburring.
If you mean a tetrahedron then it is a triangular based pyramid having 4 faces, 6 edges and 4 vertices.
having skin made rough and thick through wear
a fracture.
streak
sandpaper
Knots Landing - 1979 Rough Edges 6-19 was released on: USA: 14 February 1985
either you where to rough, or your early-- both are normal.