yeah... I think I screwed this question up completely- I might scab a mark for it but- I saw I couldn't assume so I forgot about that proof, and instead went with the one that claims "any 3 non-collinear points are con-cyclical points" , then stated as point T is the point of intersection, a...
holy shit. even as an ext1 student, I went in pretty confident averaging 90% across the year, but that threw me off completely. To many graphs and applications- you're right, this was aimed to challenge ext 1 students aswell as 2unit ones :|