Find the centre and radius of the circle `x^2+y^2=25`

Answer the following:Find the centre and radius of the circle x^2+y^2-x+2y-3=0

The centre and radius of the circle 2x^2+2y^2-x=0

Find the centre and radius of the circle (x-1/2)^2+(y-1/3)^2=1/36

Find the centre and radius of the circle (x-5)^2+(y-3)^2=20

Solve the following:findthe centre and radius of the circle x^2+y^2+6x-10y-2=0

Answer the following:Find the centre and radius of the circle x=3-4sintheta and y=2-4costheta

Solve the following:Find the centre and radius of the circle passing through the points (2,0),(6,0) and (4,2).

Find the area of the circle x^2+y^2=25 .