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Transcript of NETS
NETS
PRISM
3-D NET
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)
CYLINDERDefinition:C. S. Solid w/ 2 Cong. Bases(Circles)
3-D NET
Number of Vertices: 0
Number of Edges: 0
Number of Faces: 0
PYRAMIDDefinition:-Polyhedron w/ 1 Base (Polygons) &-Lateral Faces going from theBase 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)
3-D NET
PYRAMID
CONE
3-D NET
Number of Vertices: 1
Number of Edges: 0
Number of Faces: 0
Definition:-C.S.S. w/ 1 Base (Circle) &-Lateral Surface going from theBase to the Apex
PYRAMIDDefinition:-Polyhedron w/ 1 Base (Polygons) &-Lateral Faces going from theBase 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)
3-D NET
PYRAMID
These are NOT Nets;They are Projections (Distortions)
Nets of Spheres & HemispheresDO NOT EXIST
CONE
3-D NET
Number of Vertices: 1
Number of Edges: 0
Number of Faces: 0
Definition:-C.S.S. w/ 1 Base (Circle) &-Lateral Surface going from theBase to the Apex
In reality, Greenland is NOT the same size as South America!
They distort the features closer to the Poles because mapmakers cannot use a true “Net” of the world
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