Find the perimeter of the circle `x^2+y^2=a^2`

Find the area of the circle x^2+y^2=a^2 with radius a

Find the area of the circle x^(2)+y^(2)=a^(2) with radius a

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

Find the area of the circle x^(2) + y^(2) = a^(2) using integration.

Find the area of the circle x ^(2) + y ^(2) = 6^(2) ?

Find the area enclosed by the circle x^2+y^2=a^2 .

Find the area enclosed by the circle x^2+y^2=2

Find the equation of the circle passing through the centre of the circle x^2 +y^2 -4x-6y=8 and being concentric with the circle x^2 +y^2 - 2x-8y=5 .