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

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

Circles of radii 3 and 4 intersect orthogonally The area common to the two circles is

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

(iii)If two circles cut a third circle orthogonally,then the radical axis of two circle will pass through the center of the third circle.

If the circle |z-1|=3 and |z-z_(0)|=4 intersect orthogonally,then

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 = ?