Question

Find the centre and radius for this circle , x^2+y^2=25

Answer 1

centre = (0, 0 ), radius = 5

Explanation:

The equation of a circle centred at the origin is

x² + y² = r² ( r is the radius )

x² + y² = 25 ← is in this form

with centre = (0, 0 ) and r =
`√(25)` = 5