OCR GCSE Mathematics · J560
Specification 8.01b · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Revise: Angle TerminologyAn obtuse angle is larger than a right angle but smaller than a straight angle of 180°: for example, 120°. A reflex angle goes beyond a straight angle but stops short of a full 360° turn: for example, 240°. The two arms can define a smaller angle and a reflex angle, so a curved angle mark or arrow tells you which turn is intended.