This command fits a curve between two tangent lines and a known
chord length. It prompts for the chord length, the P.I. and points
on the two tangent lines.
Chord Length
<100.00>: 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: 2tanlcl
Prerequisite: Tangent lines should be drawn before
execution