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.
Coins have smooth edges to make them easy to stack and handle. Rough edges, also known as reeded edges, are added to coins as a security feature to prevent counterfeiting by making it difficult to file down or alter the edges of the coin.
If you mean a tetrahedron then it is a triangular based pyramid having 4 faces, 6 edges and 4 vertices.
sand paper
Deburring.
The rough edge of the tongue refers to the side edges or margins of the tongue, where tastebuds are located. These areas are sensitive to taste stimulation and play a role in detecting different flavors.
having skin made rough and thick through wear
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.