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Proof by contradiction — Eduqas GCSE Mathematics Definition | GradeGen

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Mathematics
Key terms
Proof by contradiction

GCSE Mathematics · key term

Proof by contradiction

Definition

A proof that assumes a statement is false and shows that this assumption leads to an impossibility.

Used by Eduqas

How each exam board covers it

Eduqas GCSE Mathematics · C300

Specification HG10 · Paper 1, Paper 2

A proof by contradiction explains why.
Revise: Circle Theorems

Eduqas Mathematics past papers

Related key terms

Alternate segment theorem
Arc
Chord
Cyclic quadrilateral
Perpendicular bisector

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Subtended angle