In one plane, there are four circles, each with radii 3, 1, 7, and 5 respectively. They are all tangent to line m at the same point, point A. What's the maximum area that could be between the four circles.
Somewhat unclear question (e.g. what's the significance of the word 'respectively' here?). However, one interpretation is as follows where the largest area is between the radius 7 and radius 1 circles:
