noun, noun or participle which takes 'suru'
line extension; extension of a line
Technical term used in geometry and civil engineering for extending a line segment or alignment.
この道路の延線工事は来月から始まる。
The line extension work for this road will start next month.
幾何学の問題で、線分ABの延線を考えてください。
In the geometry problem, consider the extension of line segment AB.