Model a Triangular Irregular Network (TIN) with an Entity-Relationship diagram. Consider three entity types: points, edges, and triangles; and relate those appropriately using binary relationship...

Model a Triangular Irregular Network (TIN) with an Entity-Relationship diagram. Consider three entity types: points, edges, and triangles; and relate those appropriately using binary relationship types. The diagram should prevent any redundant data in the corresponding instances (e.g., if an edge is shared by two triangles, the edge should be stored once in the database).