This command fits a curve between two tangent lines by entering a known radius. It prompts for the radius and then prompts to pick points on the two tangent lines.
Radius of Arc <300.000>: press
Enter
[nea] Pick Point on 1st Tangent Line:
pick a point
[nea] Pick Point on 2nd Tangent Line: pick
a
point
Pulldown Menu Location: Draw > Arc
Keyboard Command: 2tanlin
Prerequisite: Tangent lines should be drawn before execution
File Name: \lsp\2tanlin.lsp