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The cube is the only regular hexahedron and is one of the five Platonic solids . It has 6 faces, 12 edges, and 8 vertices. The cube is also a square parallelepiped , an equilateral cuboid and a right rhombohedron . It is a regular square prism in three orientations, and a trigonal trapezohedron in four orientations. The cube is dual to the octahedron .
Best Answer: regular hexagon: 6 lines of symmetry. 3 .. . . lines joining opposite vertices. 3 .. . . lines joining midpoints of opposite sides. regular heptagon: 7 lines of symmetry. the lines are joining one vertex to the midpoint of opposite side. now, all even-sided REGULAR polygons are similar to hexagon ..