Divide 171 by 3. 57
Therefore the middle integer is 57
<span>Therefore the highest integer is "2" higher = 59 </span>
<span>The lowest integer is 2 lower to "balance" the higher digit = 55 </span>
<span>Therefore using common sense rather than "let x=....." the answer is 55, 57 and 59.</span>
Just split it in to three rhombuses and then split each rhombus in half.
You will now have six triangles
