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

For two circles of radii r and R, the distance between their centres is d. What type of circles are they, if d lt R +r ?

Let S and S' be two (non - concentric circles with centres Aand B and radii r_(1),r_(2)and d be the distance between their centres , then one circle lies completely inside the other circle iff

The radii of two circles with centres O and O^(,)' are 9 cm and 7 cm and the distance between their centres is 20 cm Then those circles will have _______ common tangents.

The length of the direct common tangent of two circles of radii 2 cm and 8 cm is 8 cm. Then the distance between the centres of the circles is

IF two circles of radii r_1 and r_2 (r_2gtr_1) touch internally , then the distance between their centres will be

IF two circles of radii r_1 and r_2 (r_2gtr_1) touch internally , then the distance between their centres will be

The radii of two circles are R and r unit (R gtr). If the distance between the two centres of the circles be d unit, then prove that the length of their transversal common tangent =sqrt(d^(2) -(R+r)^(2)) unit.

Two circles with r_1=6.3cm and r_2=3.7cm touch externally. What is the distance between their centres?

If radii of two circles are 4 and 3 and distance between centres is sqrt37 , 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