4.03: Circle centre, radius and diameter

0606/11/M/J/26 — Question 2 · 4 marks

The equation of a circle is \((x-3)^2+(y-4)^2=20\).
(a)
Write down the coordinates of the centre.
[1]
(b)
Find the radius.
[1]
(c)
\(AB\) is a diameter and \(A=(-1,6)\). Find the coordinates of \(B\).
[2]