To fence a vegetable garden, you need to know how much wire goes around it. To plant, you need to know how much floor is inside. There are two different measurements: the perimeter and the area. Perimeter: the path around Definição · Perimeter The perimeter is the measurement of the contour of a figure: it is the sum of the lengths of all sides. An ant that goes around a rectangular table measuring 2 m by 1 m walks 2 + 1 + 2 + 1 = 6 m. This is the perimeter of the table.