`x^(2)+y^(2)-6x+8y=56`
What is the area of a circle whose equation is given above?

x ^(2) + y^(2) + 8x -20y =28 What is the diameter of the circle given by the equation above ?

y = 2x is a chord of the circle x^2 + y^2 -10 x = 0 . Find the equation of a circle whose diameter is the chord of, given circle

x ^(2) + 6x + y^(2) -8y =171 The equation of a circle in the xy-plane is shown above. What is the positive difference between the x-and y-coordinates of the center of the circle ?

x^(2)+y^(2)-6x+8y=-9 The equation of the circle in xy-plane is shown above. What is the radius of the circle?

A circle is concentric with the circle x^(2) + y^(2) - 6x + 12y + 15 = 0 and has area double of its area. Its equation is

Find the centre and radius of each of the circles whose equations are given below. x^(2) + y^(2) + 6x + 8y - 96 =0

The equation of a circle with the circle x^(2)+y^(2)-6x+12y+15=0 and having area that is twice the area of the given circle is

Find the centre and radius of each of the circles whose equations are given below. (i) x^(2) + y^(2) - 4x - 8y -41 = 0

The straight line x+y-1=0 meets the circle .x^(2)+y^(2)-6x-8y=0 at A and B . Then,the equation of : the circle of which AB is a diameter,is