The circle C C\,C has equation x2+y2+8x−4y−14=0x^2 + y^2 + 8x - 4y - 14 = 0x2+y2+8x−4y−14=0
Find the coordinates of the centre of C C\,C and the exact radius of CCC.
Show that the point (1,5)(1, 5)(1,5) lies on CCC.
76 exam-style questions on WJEC A Level Maths 1.3 Coordinate geometry in the (x, y) plane, covering 1.3.1 Coordinate geometry in the (x, y) plane, 1.3.2 Coordinate geometry in the (x, y) plane, 1.3.3 Coordinate geometry in the (x, y) plane, and 1.3.4 Coordinate geometry in the (x, y) plane. Each one has a worked solution and a mark scheme showing where the marks go.