基き線せん

noun

base line

Technical term used in surveying, mapping, geometry, and other fields to refer to a reference line from which measurements are taken.

• 測そく量りょうでは、まず基き線せんを設せっ定ていする。

  In surveying, a base line is established first.

• 三さん角かく形けいの底てい辺へんを基き線せんとして高たかさを求もとめる。

  Find the height using the base of the triangle as the base line.