If two circles of radius `4cm` and `1cm` touch each other externally then length of the direct common tangents is

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

Two circles of radii 8 cm and 6 cm touch each other externally. The length of the direct common tangent is: 8 सेमी तथा 6 सेमी त्रिज्याओं वाले दो वृत्त एक-दूसरे को बाहर से स्पर्श करते हैं | प्रत्यक्ष उभयनिष्ठ स्पर्श रेखा की लंबाई कितनी है ?

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)

Two circles of radii a and b touch each other externally and theta be the angle between their direct common tangents (a>b>=2) then

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

Two circles of radii 5cm and 2cm touch each other externally and theta is the angle contained by their direct common tangents.Then sin theta is equal to (12sqrt(10))/(lambda) where lambda equals

Two circles of radius 4 cm and 6 cm touch each other internally. What is the length (in cm) of the longest chord of the outer circle, which is also a tangent to inner circle?

Two circles of radii 8 cm and 2 cm respectively touch each other externally at the point A. PQ is the direct common tangent of these two circles of centres O_(1) and O_(2) respectively. The length of PQ is equal to :