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draw a perpendicular
Draw a perpendicular from point A to line BC.
从点A向线段BC画一条垂线。
垂线；垂直面
先理解核心含义，再看它在真实句子里的用法。
垂线；垂直面
A line or plane that is at right angles to another line or plane.
Draw a perpendicular from point A to line BC.
从点A向线段BC画一条垂线。
与另一线或平面垂直的线或平面
A line or plane that is perpendicular to another.
与另一条线成直角的直线
a straight line at right angles to another line
用于制作或标记垂直线的装置,如铅垂线
A device such as a plumb line that is used in making or marking a perpendicular line.
14至15世纪英格兰的哥特式风格；特点是垂直线条、四心拱(都铎拱)和扇形拱顶
a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
The student drew a perpendicular from the vertex to the base of the triangle.
学生从顶点向三角形的底边画了一条垂线。
Use a set square to ensure the perpendicular is exact.
用三角尺确保垂线精确。
The construction worker checked the perpendicular of the wall with a plumb line.
建筑工人用铅垂线检查了墙的垂直度。
Draw a perpendicular from point A to line BC.
从点A向线段BC画一条垂线。
The perpendicular to the base is the altitude of the triangle.
底边的垂线就是三角形的高。
常用于几何作图。
Drop a perpendicular from the vertex to the opposite side.
从顶点向对边作一条垂线。
Not this
This line is perpendicular with that line.
Use this
This line is perpendicular to that line.
错误：介词使用不当。中文表达“与...垂直”常直译为“with”，但英语中固定搭配使用介词“to”，表示一条直线与另一条直线成直角。
Not this
I drew perpendicular in the middle.
Use this
I drew a perpendicular in the middle.
错误：遗漏冠词。perpendicular 作为可数名词（垂直线）时，前面需要加不定冠词“a”，表示一条垂直线。中文没有冠词概念，易漏用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
作一条垂线
Drop a perpendicular from point A to line CD.
从点A向直线CD作一条垂线。
画垂线
Use a set square to draw a perpendicular through the midpoint.
用三角尺过中点画一条垂线。
作垂线（几何作图）
The student erected a perpendicular at the endpoint of the segment.
这名学生在线段端点处作了一条垂线。
一条直线的垂线
The perpendicular to a line forms a right angle with it.
一条直线的垂线与它成直角。
偏离垂直位置
The wall leans slightly from the perpendicular.
这面墙略微倾斜，偏离垂直位置。
Use perpendicular naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：perpendicular 中含‘pend’（像悬挂），铅垂线悬挂后必定垂直；一条线与另一条成直角，即垂线。
语域：formal 常见场景：geometry、construction、architecture 作名词时，perpendicular 通常用于几何、建筑、测量等专业语境，属于较正式的用语；日常表达“垂直的”多使用形容词形式。
常与介词to连用，表示垂直于某线的垂直线。
Dictionary facts from ECDICT, WIKTIONARY.