In the diagram, L, M and N are points on a circle with centre O. Angle LNM = 32°. Find the reflex angle LOM.
Circle Theorems
Answer: B. 296°
Inscribed-angle theorem: the angle at the centre is twice the angle at the circumference subtending the same arc.
∠LNM (at the circumference) = 32°, so the (non-reflex) ∠LOM (at the centre) = 2 × 32° = 64°.
Reflex ∠LOM = 360° − 64° = 296°, option B.