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Angles on a straight line — Edexcel GCSE Mathematics Definition | GradeGen

Home
Mathematics
Key terms
Angles on a straight line

GCSE Mathematics · key term

Angles on a straight line

Definition

Two angles next to each other whose outer arms form a straight line; together they measure 180°.

Used by Edexcel

How each exam board covers it

Edexcel GCSE Mathematics · 1MA1

Specification G3 · Paper 1, Paper 2, Paper 3

Revise: Basic Angle Facts and Vertically Opposite Angles

Edexcel Mathematics past papers

Exam tips

1
Give the angle fact that justifies each step, such as ‘angles on a straight line add up to 180°’.

Related key terms

Right angle
Vertically opposite angles

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