Two circles having radii #a#and #b# touch each other externally. If #c# is the radius of another circle which touches these two circles as well as a common tangent to the two circles, how do we prove that #1/sqrtc=1/sqrta+1/sqrtb#?
1 Answer
Jun 16, 2018
see explanation.
Explanation:
Let
In
Similarly,
In
As