The straight line passing through the focus F1 of the hyperbola and the same branch of the hyperbola intersect at two points a and B, and | ab | = m, and the other focus F2, find the perimeter of the triangle abf2
Perimeter of triangle abf2
=|AF2|+|BF2|+|AB|
=(2a+|AF1|)+(2a+|BF1)+|AB|
=4a+(|AF1|+|BF1|)+|AB|
=4a+|AB|+|AB|
=4a+m+m
=4a+2m