什么是 perpendicular?Mathematics Intersecting at or forming right angles.Being at right angles to the horizontal; vertical. See Synonyms at vertical.Of or relating to a style of English Gothic architecture of the 14th and 15th centuries, characterized by emphasis of the vertical element.In a perpendicular position.Mathematics A line or plane perpendicular to a given line or plane.A perpendicular position.A device, such as a plumb line, used in marking the vertical from a given point.A vertical or nearly vertical line or plane.