Faces | The faces of a polyhedron are polygons. | top | |
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Edges | The edges of a polyhedron are formed where common sides of neighboring polygons meet. | top | |
Vertex | A vertex of a polyhedron is a point where edges intersect. Three or more polygons must meet at each vertex. | top | |
Dihedra Angles | A dihedral angle is the angle formed by two polygons joined along a common edge. | top | |
Convex Polyhedron | A polyhedron is convex if every dihedral angle is less than 180 degrees. | top | |
Concave Polyhedron | A polyhedron is concave if at least one of its dihedral angles is more than 180 degrees. | top | |
Uniform | A polyhedron is uniform if all of its vertices are the same or congruent | top |