This command fits a curve between two tangent lines and a known
curve tangent length. It prompts for the tangent length, P.I. and
points on the two tangent lines.
Tangent Length
<50.00>:press Enter
[int on] Pick P.I. of
curve: pick a point
[nea on] Pick Point on 1st Tangent
Line: pick a point
[nea on] Pick Point on 2nd Tangent
Line: pick a point
Pulldown Menu Location: Draw > Arc
Keyboard Command: 2tanltl
Prerequisite: Tangent lines should be drawn before
execution