中ちゅう線せん

noun

median; midline

Geometry term for a line segment joining a vertex of a triangle to the midpoint of the opposite side, or more generally a line that divides something into two equal halves.

• 三さん角かく形けいの中ちゅう線せんは、頂ちょう点てんと対たい辺へんの中ちゅう点てんを結むすぶ線せん分ぶんです。

  A median of a triangle is a line segment joining a vertex to the midpoint of the opposite side.

• この図ず形けいの中ちゅう線せんを引ひいてください。

  Please draw the midline of this figure.