3 circles of radii `a, b, c (a lt b lt c)` touch each other externally and have x-axis as a common tangent then

Two circles with radii 25 cm and 9 cm touch each other externally. Find the length of the direct common tangent.

Two circles of radii 4cm and 1cm touch each other externally and theta is the angle contained by their direct common tangents. Then sintheta is equal to (a) (24)/(25) (b) (12)/(25) (c) 3/4 (d) none of these

Two circles of radii 4cm and 1cm touch each other externally and theta is the angle contained by their direct common tangents. Find sin (theta/2)+cos(theta/2) dot

Three circles whose radii are a,b and c and c touch one other externally and the tangents at their points of contact meet in a point. Prove that the distance of this point from either of their points of contact is ((abc)/(a+b+c))^(1/2) .

A charge Q is distributed over three concentric spherical shells of radii a, b, c (a lt b lt c) such that their surface charge densities are equal to one another. The total potential at a point at distance r from their common centre, where r lt a, would be :

Two circles with radii a and b touch each other externally such that theta is the angle between the direct common tangents, (a > bgeq2) . Then prove that theta=2sin^(-1)((a-b)/(a+b)) .

Two circles with radii a and b touch each other externally such that theta is the angle between the direct common tangents, (a > bgeq2) . Then prove that theta=2sin^(-1)((a-b)/(a+b)) .

Two circles of radii r_(1) and r_(2), r_(1) gt r_(2) ge2 touch each other externally. If theta be the angle between the direct common tangents, then,

Circles with radii 3, 4 and 5 touch each other externally. If P is the point of intersection of tangents to these circles at their points of contact, then if the distance of P from the points of contact is lambda then lambda_2 is _____

Two circles of radii a and b touching each other externally, are inscribed in the area bounded by y=sqrt(1-x^2) and the x-axis. If b=1/2, then a is equal to (a) 1/4 (b) 1/8 (c) 1/2 (d) 1/(sqrt(2))