Perimeter of the new triangle is 576 ft
Step-by-step explanation:
Perimeter of the triangle = sum of the sides = a + b + c = 72 ft
Each side is multiplied by 8, so new sides are 8a, 8b, 8c
⇒ New perimeter = 8a + 8b + 8c = 8(a + b + c) = 8 × 72 = 576 ft