Author: bpgen Posted: Thu Mar 11, 2010 7:02 am (GMT -8) Thanks all! Answer would be A alone sufficient. Here is bit detail explanation: As we know cosine formulas, and cosX always > 0 if it’s angle 0 Therefore, if you take ratio of sides: AC =3x, BC = 4x, AB = 6x we have: 9+16> 36 9+36> 16 36+16> 9 Hence triangle is acute angled triangle(all angles of triangle ABC smaller than 90 degrees)

See the original post here:
Data Sufficiency :: RE: ABC triangle