In the diagram, the points A, B, C and D lie on the circle, centre O. TA and TB are tangents touching the circle at A and B respectively. Angle AOB-132°, angle ACD = 59° and AOC is a straight line. 66 (i) Find, stating reasons clearly, (a) angle ATB, (b) angle BDA, to) angle BDC, (d) angle OBD. 132 Given that the radius of the circle is 6 cm, calculate the length of chord AD. b) A 48 DA = 132° 2 (ii)

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