线段

一人正在试作线段,繪于1699年。

數學上,線段直線上两点间的一段,这两个点称为端点。參見區間

當終點均在圓周上,該線段稱為。當它們都是多邊形頂點,若它們是毗鄰的頂點該線段為,否則就是對角線

在生活應用上,主要有三種——連結、隔開、刪除

  1. 連結
    將不同處的兩者做關連性的鍵結,其他如指示性補充亦同。
  2. 隔開
    將同一處的兩區域分離,其他如景深、等位線亦同。
  3. 刪除
    例:於撰寫文章時,為保留創作的過程而將不妥之文句以線劃除,其他如路線中的各站亦同。

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