Glossary

**Glossary**

Faces|Edges |Vertex|Dihedral Angle |Convex Polyhedra|Concave Polyhedra|Uniform
Faces	The faces of a polyhedron are polygons.	top
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