Two vertical poles stand 8.4m apart. AA' is 4.4m high, BB' is 3.1m high (A' and B' lying on the ground). A point P on the ground is defined to be a “convenient point”, if the viewing angle of points A and B from P is an acute one. If you move away from the poles, you can certainly find convenient points. There is a region of points on the ground, however, where all points are inconvenient.
Find the area of this region of inconvenient points.
The required circular area of inconvenient points is approximately equal to 1256.637 square decimates.
Puzzle Answer
