The figure shows an aerial view of a playground. if david runs around the field three times, he covers a distance of yards.

There isn't much we can do about this problem judging by the lack of information but we can have a general way of answering this problem. If we are given a polygon, or shapes with sides, we add up all the sides to get the perimeter. If it's a circle, get the circumference. Then with the perimeter we multiply this with 3. That is how we answer the problem. 

Yes, two vertical lines can be complementary

Just look outside and then you’ll see where the awnser is