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GCSE Mathematics · key term
A triangle with three equal sides and three angles of 60°.
Used by AQA, Edexcel and OCR
Specification G4 · Paper 1, Paper 2, Paper 3
Revise: Quadrilaterals and PolygonsThe two naming systems can combine: a right-angled triangle might also be isosceles or scalene, whereas every equilateral triangle is acute-angled.
Specification G4 · Paper 1, Paper 2, Paper 3
A triangle with three equal sides.
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Specification 8.01c, 8.04a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
A triangle with three equal sides.
Revise: Polygon ClassificationAn equilateral triangle and a square are regular polygons. If either the sides or the angles differ, the polygon is irregular. For instance, a rectangle that is not a square has four equal angles but two different side lengths, so it is not regular.