<span>When 3 Triangle sides are known: </span><span>The longest side must be less than the sum of the other 2 sides. 5, 12 and 13 - can be constructed </span>2, 11 and 15 <span>- can be constructed 3, 7 and 11 - CAN'T be constructed - the longest side is greater than the sum of the other two. 4, 8 and 15 </span><span>- CAN'T be constructed - the longest side is greater than the sum of the other two Source: http://www.1728.org/trianinq.htm
