Answer: 3 possible common tangents to circles A and B .
Step-by-step explanation:
A line that touches a curve or a circle at a point without crossing over is called tangent.
A line tangent to a circle is always perpendicular to the radius to the point of tangency.
When two circles touch each other externally, there are 3 lines which make right angle with radus of the circles at the point of intersection of circle and tangents.
Therefore, 3 common tangents can be drawn to the circles can exist .
