Question 1145420
1st side = x
2nd side = x + 4
3rd side = (x + 4) + 5 = x + 9
<pr>
x(x + 9) + (x + 4)(x + 9) = 2x² + 124
<pr>
x² + 9x + x² + 13x + 36 = 2x² + 124
<pr>
2x² + 22x + 36 = 2x² + 124
<pr>
22x + 36 = 124
<pr>
22x = 88
<pr>
x = 4
<pr>
1st side = x = 4
2nd side = x + 4 = 8
3rd side = x + 9 = 13
<pr>
The perimeter of the triangle is 25.