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