Glossary
Perpendicular Lines
Perpendicular lines meet at a right angle, and the product of their gradients is , so . This means one gradient is the negative reciprocal of the other.
The rule lets us find the equation of a line at right angles to a given line.
Meaning
Perpendicular lines meet at a right angle, and the product of their gradients is , so . This means one gradient is the negative reciprocal of the other.
The rule lets us find the equation of a line at right angles to a given line.
Where it appears in Add Math
You meet Perpendicular Lines in the Coordinate Geometry chapter of SPM Additional Mathematics. Knowing the term precisely matters in the exam: questions often hinge on reading a keyword correctly, and because SPM marking is analytic, using the right definition in your working helps secure method marks.
Our teachers make sure a student can not only recite what Perpendicular Lines means but use it fluently in a full solution.
The term in three languages
Because the SPM Add Math paper is bilingual (BM/EN), it helps to know this term in each language: Perpendicular Lines (EN) · Garis Serenjang (BM) · 垂直线 (中文)
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