A circle that has a centre of coordinates (a, b) and a radius of length r has an equation of the form: (x − a)² + (y − b)² = r².

1

State the equation of a circle with centre (0, 5) and radius 8.

2

State the equation of the given circle.

3

State the equation of the given circle.

4

A circle has equation x² + y² = 9. State the coordinates of the centre of the circle and the length of its radius.

5

State the equation of the given circle.