Answer:
150, 150, 270
Step-by-step explanation:
let the congruent sides be x, then
the third side is 2x - 30 ( 30 shorter than twice the congruent sides )
The perimeter = 570, hence
x + x + 2x - 30 = 570
4x - 30 = 570 ( add 30 to both sides )
4x = 600 ( divide both sides by 4 )
x = 150
2x - 30 = (2 × 150) - 30 = 300 - 30 = 270
The length of the 3 sides are 150, 150 and 270
