In the figure above, DCO = 25° and O is the centre of the circle. ABCDE are points on the circumference. Calculate giving reasons, and KN are drawn. the sizes of: a) D₁ b) 0₁ c) Â₁ In the diagram. O is the centre of the circle Diameter LR subtends LRR at the circumference of the circle. Nis point on another the circumference and chords LN Calculate, giving reasons, the size of N

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