Question

A line meets the coordinate axes in A and B. A circle is circumscribed about the triangle OAB. If m and n are the distance of the tangents to the circle at the points A and B respectively from the origin, the diameter of the circle is.

• A. $m ( m + n )$
• B. $m + n$
• C. $n ( m + n )$
• D. $\frac { 1 } { 2 } ( m + n )$

Answer 1

Answer: (B)

$m + n$

Answer 2

It is clear from the figure that diameter is $m + n$.