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NETS

NETS. 3-D. NET. PRISM. Definition: Polyhedron w/ 2 Cong. Bases ( Polygons ). Number of Vertices: 2 * (# of edges of a base) Number of Edges: 3 * (# of edges of a base) Number of Faces: 2 + (# of edges of a base). 3-D. NET. CYLINDER. Definition: C. S. Solid w/ 2 Cong. Bases

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NETS

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  1. NETS

  2. 3-D NET PRISM Definition: Polyhedron w/ 2 Cong. Bases (Polygons) Number of Vertices: 2* (# of edges of a base) Number of Edges: 3* (# of edges of a base) Number of Faces: 2+ (# of edges of a base)

  3. 3-D NET CYLINDER Definition: C. S. Solid w/ 2 Cong. Bases (Circles) Number of Vertices: 0 Number of Edges: 0 Number of Faces: 0

  4. 3-D NET PYRAMID PYRAMID Definition: -Polyhedron w/ 1 Base (Polygons) & -Lateral Faces going from the Base to the Apex Number of Vertices: 1+ (# of edges of a base) Number of Edges: 2* (# of edges of a base) Number of Faces: 1+ (# of edges of a base)

  5. 3-D NET CONE Definition: -C.S.S. w/ 1 Base (Circle) & -Lateral Surface going from the Base to the Apex Number of Vertices: 1 Number of Edges: 0 Number of Faces: 0

  6. Nets of Spheres & Hemispheres 3-D NET DO NOT EXIST PYRAMID PYRAMID Definition: -Polyhedron w/ 1 Base (Polygons) & -Lateral Faces going from the Base to the Apex Number of Vertices: 1+ (# of edges of a base) Number of Edges: 2* (# of edges of a base) Number of Faces: 1+ (# of edges of a base) These are NOT Nets; They are Projections (Distortions)

  7. 3-D NET CONE Definition: -C.S.S. w/ 1 Base (Circle) & -Lateral Surface going from the Base to the Apex Number of Vertices: 1 Number of Edges: 0 Number of Faces: 0 They distort the features closer to the Poles because mapmakers cannot use a true “Net” of the world In reality, Greenland is NOT the same size as South America!

  8. Website’s URLs that were used • Prisms & Pyramids: http://www.learner.org/interactives/geometry/3d_pyramids.html • Cylinders: • http://www.youtube.com/watch?v=xjksDmSROek • Cones: • http://www.youtube.com/watch?v=z2_B7ICWTCk • Spheres& Hemispheres • http://en.wikipedia.org/wiki/Map_projection • http://www.worldpress.org/map.cfm

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