3.1 In the diagram below, O is the centre of the circle. Chord AB is perpendicular to diameter DC. CM: MD= 4:9 and AB = 24 units. B 3.1.1 Determine an expression for DC in terms of x if CM-4x units. 3.1.2 Determine an expression for OM in terms of x 3.1.3 Hence, or otherwise, calculate the length of the radius of the circle (1) (2)
