O is the centre of the circle. ||. is a tangent. 3 = . Figure 4: Diagram for question 3. 3.1 Name three angles equal to , using reasons. (6) 3.2 Determine with reasons the size of: 3.2.1 1 (2) 3.2.2 in terms of . (2) 3.3 Prove that: 3.3.1 = (3) 3.3.2 ∆|||∆ (4) 3.3.3 . = . 2 (4)