For example your house has a fenced yard. Rectangle Perimeter 2 a b Quadrilateral Perimeter a b c d. Perimeter a b c.
The perimeter is the distance around the object.
If the yard is 50 ft 50 ft your fence is 200 ft long. Circle Circumference 2pr r radius. To calculate a circles perimeter knowledge of its radius or. The perimeter of the soccer field above is 110 110 70 70 360 meters.