If a regular polygon is inscribed in a circle the sum of all the angles subtended by its sides at the centre is
180o
120o
360o
90o
Sum of angles subtended at a point is always 360o.
In the given figure, AB is a side of a regular six-sided polygon and AC is a side of a regular eight-sided polygon inscribed in the circle with centre O. Calculate the sizes of :
(i) ∠ AOB,
(ii) ∠ ACB,
(iii) ∠ ABC.