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 .

The circles having radii r1 and r2 intersect orthogonally Length of their common chord is

The circles having radii r_1 and r_2 intersect orthogonally. Length of their common chord is