convert line-like curve & planar curve to straight line?

Hi all,

I have a set of consist of PlanarCurves and LineLikeCurves.

I want to convert them all into straight lines.

The way I got these PlanarCurves and LineLikeCurves is from mapping brep [constructed with all straight lines] into a curved surface. After mapped, the straight lines of the brep also bend along with the curve surface. But each those PlanarCurves and LineLikeCurves originally defined only by two points (starting and end points)

Any advise how to fix this?

Thank you in advance.