Question

what is perimeter ??????????????????

Answer 1

A perimeter is a path that surrounds a two-dimensional shape. The term may be used either for the path or its length—it can be thought of as the length of the outline of a shape. The perimeter of a circle or ellipse is called its circumference. Calculating the perimeter has several practical applications. 

Answer 2

It is the outside edge or limit of an area of land.
in geometrical meaning it is the circumference of any plane area.