Question
Two circles radii 3cm and rcm touch each other externally at T. if the length of their common tangent PT is 8cm.calculate the value of r
Answers
oobleck
Draw a diagram, and you can see that
(r+3)^2 + (r-3)^2 = 8^2
(r+3)^2 + (r-3)^2 = 8^2