How to show orientation of lines using Velcro rods
View of 3 velcro rods for showing orientation of lines in solids

 

A cube with two parallel edges marked with velcro rods showing parellel edges
A cube with two perpendicular edges marked with velcro rods showing two prependicular edges
A cube with two skew edges marked with velcro rods showing skew edges
parallel
perpendicular
skew
     

 

Dodecahedron with velcro rods showing three pairs of parallel edges
     
  parallel edges in dodecahedron  

 

 

    
How to show directions of lines in 3-D directions of lines in 3-d from video  
     

 

 
Copyright © 2004 - 2017 Aniceta Skowron, Geometro. All rights reserved. brightsidemedia.com 2011