Let two circles touch each other externally and P is the point of intersection of there direct common tangents. If the direct common tangents from P touches the circles at A and B on same side and PA=AB=4, then the radius of smaller circle (in units) is

Let two circles touch each other externally and P is the point of inte

1.	Let two circles touch each other externally and P is the point of intersection of there direct common tangents. If the direct common tangents from P touches the circles at A and B on same side and PA=AB=4, then the radius of smaller circle (in units) is
Answer» Let two circles touch each other externally and $P$ is the point of intersection of there direct common tangents. If the direct common tangents from $P$ touches the circles at $A$ and $B$ on same side and $P A = A B = 4$ , then the radius of smaller circle (in units) is