Higher November 2019 Paper 3 Q20

20 P (−1, 1) is a point on the circle, centre \(O\), radius \(r\).

Not drawn accurately

Work out the value of \(r\).

Circle your answer. [1 mark]

• \(1\)
• \(2\)
• \(\sqrt{2}\)
• \(2\sqrt{2}\)