a circle of radius 12 cm which passes through the points P and Q.
The chord PQ subtends an angle of 120° at the centre of the circle.
(a) Find the exact length of the major arc PQ.
(b) Show that the perimeter of the shaded minor segment is given by
k(2pie + 3sqrt 3 ) cm, where k is an integer to be found.
(c) Find, to 1 decimal place, the area of the shaded minor segment as a percentage
of the area of the circle.
i just cant get part (B)
how do u find it for the chord? any specific formula isnt it that we have to us ethe cosine rule?