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

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

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

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

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

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

Two circles touch internally. The sum of their areas is 136pi cm^(2) and distance between their centres is 4 cm. What are the radii of the circles ?

Two circules touch internally. The sum of their areas is 116 pi cm^(2) and the distance between their centres is 6 cm. find the radii of the circles.