Additional Mathematics (4037) Topic 8 · Coordinate geometry of the circle 8.1 Equation, centre and radius of a circle Key ConceptsLearn FirstLoading… Key FormulasKnow TheseLoading… Common MistakesAvoid TheseLoading… StrategyApply ThisLoading…4037-SUB-8.1-1Non-CalculatorLoading… 4037-SUB-8.1-2CalculatorLoading…