I need some help with my math right now =]?

Question

Given triangle PQR with vertices P(-2,5), Q(5,1) and R(-4,-5) find: the radius of the circle through points P,Q,R. i dont get how theres a cricle through the points? how would you do that? please show me the work so i understand thank you soo much

Answer 1

it is something to do with circle theorum. you just draw a circle through the three points.
however, it would usually be done the other way round ie. draw a circle, then plot three points along the circumference.
sorry i couldn't be much help with the circle theorum but i only learnt about that today and i still don't really understand it! lol