AQA GCSE Mathematics · 8300
Specification G3 · Paper 1, Paper 2, Paper 3
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GCSE Mathematics · key term
Angles formed opposite each other when two straight lines cross; each opposite pair is equal.
Used by AQA, Edexcel and OCR
Specification G3 · Paper 1, Paper 2, Paper 3
Specification G3 · Paper 1, Paper 2, Paper 3
The pair of angles facing each other where two straight lines cross; they are equal.
For vertically opposite angles, check that the lines cross: angles that merely look opposite in a drawing are not necessarily equal.
Do not assume that angles which merely look alike are equal; vertically opposite angles are formed by two intersecting straight lines.
Corresponding and alternate angle rules require parallel lines. Vertically opposite angles do not.
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Specification 8.03c · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Two angles directly opposite each other where two lines intersect; they are equal.
Revise: Parallel Line AnglesAt one intersection, look for angles directly across the crossing point from one another. These are vertically opposite angles, and they are equal.