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Glossary

Ambiguous Case

The ambiguous case arises when using the sine rule with two sides and a non-included angle, because a given sine value matches both an acute and an obtuse angle. This can allow two different triangles to fit the same data, so both possibilities must be checked.

Meaning

The ambiguous case arises when using the sine rule with two sides and a non-included angle, because a given sine value matches both an acute and an obtuse angle. This can allow two different triangles to fit the same data, so both possibilities must be checked.

Where it appears in Add Math

You meet Ambiguous Case 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 Ambiguous Case 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: Ambiguous Case (EN) · Kes Berambiguiti (BM) · 模糊情形 (中文)

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Written by the spmaddmath.com.my editorial team.· Last updated 5 September 2026

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