An angle less than 90° is [ ]; an angle exactly 90° is [ ].
An angle less than 90° is acute; an angle exactly 90° is right.
Flashcards for CIE IGCSE Maths Angles, covering the key terms, formulae and methods you need to recall for Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended). 22 cards, matched to the CIE IGCSE Maths (0580) specification.