Skip to content

Loading…

Home
Subjects
Past papers
Key terms
Pricing

My courses

Select your courses

Loading…

Subjects

History
Geography
Biology
Chemistry
Physics
Mathematics
Classics

Resources

Browse courses
Past papers
Key terms & definitions
Pricing

About

Sign up
Log in
Privacy Policy
Terms of Service

© 2026 GradeGen

Not affiliated with any exam board.

Angle–opposite-side pair — AQA GCSE Mathematics Definition | GradeGen

Home
Mathematics
Key terms
Angle–opposite-side pair

GCSE Mathematics · key term

Angle–opposite-side pair

Definition

A known angle and the side directly opposite it in a triangle.

Used by AQA

How each exam board covers it

AQA GCSE Mathematics · 8300

Specification G22 · Paper 1, Paper 2, Paper 3

The rule is useful when there is a known angle–opposite-side pair and you also know either another angle or another side. Typical information patterns are two angles and one side, or two sides and an angle opposite one of them.
Revise: Sine and Cosine Rules

AQA Mathematics past papers

Exam tips

1
Use the sine rule only when you know an angle–opposite-side pair. Use the cosine rule for SAS or SSS information.

Related key terms

Cosine rule
Included angle
Inverse trigonometric function
Sine rule

Revise Mathematics with GradeGen

Create a free account to read GCSE Mathematics revision notes for your exam board and track your progress.

Sign Up to Start Revising Log In