Let `C_(1)` and `C_(2)` be two circles of unit radii, if the distance between the centers of two circles is 1, the common area of the circles is `(api)/(b)+sqrt(b)/a`. Then ab = ?

If the distance between the centers of two circles of unit radii is 1 , the common area of the circles is

R and r are the radii of two circles (R > r). If the distance between the centres of the two circles be d, then length of common tangent of two circles is

R and r are the radius of two circles (R gt r) . If the distance between the centre of the two circles be d , then length of common tangent of two circles is

Consider two circle of radius 3 and 1 and distance between the centre of these two circle is 5, then length of external common tangent is

If two circles each of unit radius intersect orthogonally,the common area of the circles is

If the distance between the centers of two circles of unit radii is 1 the common area of the circles is 1) (2 pi)/(3)-sqrt(3) 2) (2 pi)/(3)+sqrt(3) 3) (2 pi)/(3)-(sqrt(3))/(2) 4) (2 pi)/(3)(sqrt(3))/(3)

If radii of two circles are 4 and 3 and distance between centres is sqrt(37) then angle between the circles is

If radii of two circles are 4 and 3 and distance between centres is sqrt(37) then angle between the circles is

The condition for two circles with radii and r_(1) and r_(2) be the distance between their centre,such that the circles are orthogonal is