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parallel axiom

/ˈpærəlel ˈæksiəm/

翻译: 欧几里得几何中的一条基本公设,断言过直线外一点有且仅有一条直线与已知直线平行;等价形式为:若一条截线与两条直线相交,同侧内角和小于两直角,则这两条直线在该侧相交。

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phrase

/ˈpærəlel ˈæksiəm/C1formalscientific
  • zh欧几里得几何中的一条基本公设,断言过直线外一点有且仅有一条直线与已知直线平行;等价形式为:若一条截线与两条直线相交,同侧内角和小于两直角,则这两条直线在该侧相交。

A fundamental postulate in Euclidean geometry stating that if a line segment intersects two straight lines forming two interior angles on the same side that sum to less than two right angles, then the two lines, if extended indefinitely, meet on that side. It is equivalent to the statement that through a point not on a given line, exactly one parallel line can be drawn.

  1. Euclidean geometry postulateC2formal

    A fundamental axiom in Euclidean geometry stating that through a point not on a given line, exactly one line can be drawn parallel to the given line.

    zh平行公设

    • The parallel axiom is essential for proving many theorems in plane geometry.
    • Euclid's fifth postulate is often referred to as the parallel axiom.
    • Non-Euclidean geometries arise from rejecting the parallel axiom.