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(a) In the figure below which is not drawn to scale, EF is a chord of a circle pass- ing through E, C and F. CD bisects EF perpendicularly at D. If EF = 12 cm and CD = 2 cm, calculate the length of the radius of the circle whose segment is shown. C 2 m h H H F E D 12 m (b) If O is the centre of the completed cir- cle, calculate the area of the sector OEC correct to 3 significant figures. (WAEC) (Take л=3.142)
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