In the diagram, O is the centre of the circle through the points A, B, C, D and T. HC and HT are tangents to the circle at C and T respectively. AD is produced to meet HT at R OC bisects AD at J. Let C3 = x.
11.1 Write down, with a reason, another angle equal to 
3 . (2)
11.2 Show that CHRJ is a trapezium. (5)
11.3 Prove that OC bisects 
. (3)
11.4 Write down, with a reason, 
in terms of x (2)
11.5 Determine 
2 in terms of x (6)
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TOTAL: 150