relative constraint with polylines drawing...

 From:  Frenchy Pilou (PILOU) 23 Apr 2007  (14 of 31) 
547.14 In reply to 547.13 
Not more easy to draw just a "perpendicular vertical helper" by the center of the line and draw the 3 pts arc by Start On End ? ;)
---
Pilou
Is beautiful that please without concept!
My Gallery

EDITED: 23 Apr 2007 by PILOU
Attachments:
Attachmentarc.jpg