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Triangular Pyramid

Triangular Pyramid Facts
Notice these interesting things:
  It has 4 Faces
  · The 3 Side Faces are Triangles
  · The Base is also a Triangle
  It has 4 Vertices (corner points)
  It has 6 Edges
  If all edges are equal then it is also a Tetrahedron
   
And for reference:
  Surface Area = [Base Area] +
1/2 × Perimeter × [Side Length]
 
  Volume = 1/3 × [Base Area] × Height
 
hexahedron Instructions: In "spin" mode it freely spins and will respond to your mouse. In "drag" mode it stops spinning and you can use your mouse to move it. If you cannot see the animation at all, you will need to install "Flash Player".