EXTRI komanda produžuje (ili skraćuje) izvodnice trouglova u odnosu na odabrane krajnje ivice, uz kriterijum zadržavanja nagiba izvodnice ili zadržavanja krajnje kote izvodnice.
Command: EXTRI
Pick line to extend to:
Enter length of construction line:
Keep fix:[Grade/Elevation] <Grade>:G (odabrati konstatan nagib ili krajnju kotu)
Select paired triangles common side...
Extend to:
Select paired triangles common side...
Extend to:
Select paired triangles common side...