In figure Q, P, T , S and R lie on the circle. M lies on QS such that PM || SR. PTS=145o
9.1 Calculate the size of:
9.1.1 
(2)
9.1.2 
(2)
9.1.3 
(1)
9.2 Why is PR tangent to the circle passing through P, M and Q? (1)
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