Glossary
Arc Length
The arc length is the distance along the curved edge of a circle between two points. When the angle at the centre is measured in radians, it is given by , where is the radius.
This simple formula is a key reason radians are used.
Meaning
The arc length is the distance along the curved edge of a circle between two points. When the angle at the centre is measured in radians, it is given by , where is the radius.
This simple formula is a key reason radians are used.
Where it appears in Add Math
You meet Arc Length in the Circular Measure 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 Arc Length 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: Arc Length (EN) · Panjang Lengkok (BM) · 弧长 (中文)
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