Answer:
As we can see in the picture, we already knew 4 out of 6 sides of the figure so we need to find the other sides.
So the first missing side (the one near the 3 m one) should be:
7 - 4 = 3 (m)
The second missing side (the one near the 4m one) should be:
6 - 3 = 3 (m)
Now that we know all of the side lengths of the figure, the perimeter of the figure will be:
7 + 3 + 3 + 3 + 4 + 6 = 26 (m)