Find the equation of the circle whose radius is 5 and centre lies on the positive side of x-axis at a distance 5 from the origin.

Find the equation of the circle whose centre lies on the positive direction of y-axis at as distance 6 from the origin and whose radius is 4.

The equation of the circle whose radius is 5 and which passes through the points on x-axis at a distance 3 from the origin is

Find the equation of a circle whose centre is (2,-3) and radius 5.

Find the equation of the parabola whose vertex and focus are on the positive X-axis at a distance of a and a' from the origin respectively.

Find the equation of the circle whose centre is (2, -2) and radius is 8.

Find the equation of a circle whose centre is (2, 3) and radius is 5.

Find the equation of the circle with : Centre (1, -5) and radius 7 .

Find the equation of the circle which touches x-axis and whose centre is (1,2).

Obtain the equations of the straight lines passing through the point A(2, 0) & making 45 with the tangent at A to the circle (x + 2)^2 + (y-3)^2 = 25 . Find the equations of the circles each of radius 3 whose centres are on these straight lines at a distance of 5sqrt2 from A.

Find the equation of the circle which passes through two points on the x-axis which are at distances 4 from the origin and whose radius is 5.