A circle has the equation x2+y2=13x^2 + y^2 = 13x2+y2=13
Write down the exact length of the radius of the circle.
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Markscheme
Perpendicular Lines and the equation of a tangent Questions
130 exam-style questions on WJEC GCSE Maths Perpendicular Lines and the equation of a tangent. Each one has a worked solution and a mark scheme showing where the marks go.