Two circles of radii 8 cm and 6 cm touch each other externally. The length of the direct common tangent is:
Answer & explanation
Correct answer: option 1
Length of direct common tangent = \(\sqrt {d² - ( R - r )² }\)
= \(\sqrt {14² - ( 8 - 6 )² }\)
= \(\sqrt {196 - 4 }\)
= \(\sqrt {192 }\)
= 13.86 cm