(In reply to
re: solution by Federico Kereki)
Since the angles of a triangle add up to 180 degrees, no one angle can be greater than 180 degrees, sin(a)sin(b)>=0. In fact equality is achieved only in the degenerate triangle where a and b are each zero degrees and c is 180, which is another "solution" if degenerate triangles are allowed.

Posted by Charlie
on 20040227 07:22:17 