When distant between their centres is equal to the difference of the radii.

When distant between their centres is less than the difference of radii

When distant between the centres is equal to the sum of the radii.

Two circles touch externally and sum of their areas is 130picm^2 and the distance between their centres is 14 cm. What is the difference in the radii of the circles ?

When distant between the centres is grater than the sum of radii.

When distant between the centres is less than sum of radii and greater than their absolute difference.

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

The distance between the centres of the two circles of radii r_1 and r_2 is d. They will thouch each other internally if