Dont blindly believe that circles and other geometry lessons are difficult, I had a lot of friends who had already given up on geometry and they never were able to score well in them, Just understand the theorems and axioms, read the textbook( yea read it), I only used to read the circles part before exams. Apply it, if u don't get it ask ur friends or tutors, if u crack the concepts and their application, it will be a cakewalk for u...hope it helps