A circle has the equation x2+y2=20x^2 + y^2 = 20x2+y2=20
Write down the coordinates of the centre of the circle.
Write down the exact length of the radius of the circle.
P P\,P is the point (−4,2)(-4, 2)(−4,2) on the circle x2+y2=20x^2 + y^2 = 20x2+y2=20
Work out the equation of the tangent to the circle at PPP.
Practise Edexcel GCSE Maths Perpendicular Lines and the equation of a tangent with exam-style questions for Foundation and Higher tier. 36 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
