Answer:
If each side of pentagon is doubled then its perimeter will also be doubles. The new perimeter is 30 feet.
Explanation:
Let the length of all five sides of pentagon = v, w, x, y, and z.
Perimeter of pentagon = Sum of lengths of its all five sides = (v + w + x + y + z) = 15 feet
If each side of pentagon is doubles then,
New perimeter of pentagon = (2v + 2w + 2x + 2y + 2z)
= 2 (v + w + x + y + z)
= 2 (15)
= 30 feet
Therefore, if each side of pentagon is doubled then its perimeter will also be doubled.