If radii of two circles are `4` and `3` and distance between centres is `sqrt(37)` then angle between the circles is

If radii are 2, sqrt(2) and distance between centres is sqrt(2) then the angle between the circle is

The radii of two circles are 4.5 cm and 3.5 cm respectively. The distance between the centres of the circles is 10 cm. What is the length of the transverse common tangent ?

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

R and r are the radii of two circles (R > r). If the distance between the centres of the two circles be d, then length of common tangent of two circles is

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 = ?

Two circles touch internally.The sum of their areas is 170 pi cm and the distance between their centres is 4cm.Find the radii of the circles