To find the equation of a circle when you know the radius and centre, use the formula \({(x - a)^2} + {(y - b)^2} = {r^2}\), where \((a,b)\) represents the centre of the circle, and \(r\) is the ...

exponential graphs - Higher, The equation of a circle - Higher,the equation of the tangent to a circle - Higher and sketching graphs. If you struggled with the quiz, don't panic - we've got you!