If you Have Stringer Topo installed and you want to turn arcs into chords , Stringer Topo has a great function in Stringer Extras that will allow you to truncate the Arc/Lines into chords at a distance or evenly set amount of chords required. Good for Subdivisons where arcs aren't required and a set amount of chords are.
Below is how to get it to work
Type TRUN in the command line
Then select the 2 lines you want Then select T for Truncation in the command line What are the lengths on the Truncation you require - lets say 4m It will then do a radius of 4m between the 2 lines Then when it says Enter A to specify Chord Deflection - type 4 in the command line This has now added 4 chords for that arc in the drawing.