Answer:
4cm
Explanation:
Firstly, we need to know the perimeter of the rectangle so as to know the length used to make the rectangle. This is 2(l + b)
P = 2(12 + 6) = 2(18) = 36cm
The length remaining to make the hexagon would be 60 - 36 = 24cm
Now since the hexagon is regular, the length of each side would be 24/6 = 4cm
Note: hexagon is a polygon with 6 sides