1. The problem is to find the "omkreds" which is Danish for "perimeter" of a shape. 2. The perimeter of a polygon is the sum of the lengths of all its sides. 3. To calculate the perimeter, add the lengths of each side together. 4. For example, if a polygon has sides of lengths $a$, $b$, $c$, and $d$, then the perimeter $P$ is given by: $$P = a + b + c + d$$ 5. If you provide the lengths of the sides or the type of shape, I can calculate the exact perimeter for you.