1. Polyhedra

2. A polyhedra is simply a three-dimensional solid which consists of a collection of polygons, usually joined at their edges.

3. Polygon vs Polyhedra The words are derived from the Greek word poly (many) and gon (side) or hedra (face). A polyhedra is a 3-D shape with many faces. A polygon is a 2-D shape with many sides.

4. Polyhedra Polygon Face Tetrahedra Hexahedra Octahedra Dodecahedra Icosahedra

5. Tetrahedra A tetrahedron is a 3-D figure made up of four equilateral triangles.

6. Tetrahedra Net A net is a the two-dimensional pattern.

7. Polyhedra faces edgesvertices tetrahedron hexahedron octahedron dodecahedron Icosahedron

8. Hexahedra A Hexahedron is a 3-D figure made up of six identical squares.

9. Hexagedra Net A net is a the two-dimensional pattern.

10. Polyhedra faces edgesvertices tetrahedron464 hexahedron octahedron dodecahedron Icosahedron

11. Hexagedra Net There are many different nets for a hexahedron or cube. Look at the nets below, which one will make a cube or hexhedra?

12. Octahedra A Octahedron is a 3-D figure made up of eight equilateral triangles.

13. Hexagedra Net A net is a the two-dimensional pattern.

14. Polyhedra faces edgesvertices tetrahedron464 hexahedron6128 octahedron dodecahedron Icosahedron

15. Dodecahedra A Dodeachedron is a 3-D figure made up of twelve equilateral pentagons.

16. Dodecahedra Net A net is a the two-dimensional pattern.

17. Polyhedra faces edgesvertices tetrahedron464 hexahedron6128 octahedron8126 dodecahedron Icosahedron

18. Icosacahedra A Icosahedron is a 3-D figure made up of twenty equilateral triangles.

19. Icosacahedra Net A net is a the two-dimensional pattern.

20. Polyhedra faces edgesvertices tetrahedron464 hexahedron6128 octahedron8126 dodecahedron 123020 Icosahedron

21. Polyhedra faces edgesvertices tetrahedron464 hexahedron6128 octahedron8126 dodecahedron 123020 Icosahedron 203012