Heron's Formula

Heron's formula finds the area of a triangle from its three side lengths alone, without needing an angle or height. With semi-perimeter $s=\frac{a+b+c}{2}$, the area is $\sqrt{s(s-a)(s-b)(s-c)}$.

It is handy when only the sides are given.

You meet Heron's Formula in the Solution of Triangles 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 Heron's Formula means but use it fluently in a full solution.

Because the SPM Add Math paper is bilingual (BM/EN), it helps to know this term in each language: Heron's Formula (EN) · Rumus Heron (BM) · 海伦公式 (中文)

Other key terms from the Solution of Triangles chapter you may want to check:

• Sine Rule
• Cosine Rule
• Ambiguous Case
• Area of a Triangle
• Included Angle