Diameter
The perimeter
Perimeter is the outside. The area is the inside of a shape.
The perimeter of a shape is the distance around the outside. For a shape with straight sides, the perimeter is the sum of the length of the sides. The perimeter of a circle is called the circumference, and is calculated by multiplying the diameter by pi.
Perimeter is the outside of a shape
A polygon is a closed plane figure that is bound by at least three straight sides. Perimeter is the total lengths of the sides of a shape. They are different because a polygon refers to the shape, and perimeter refers to the distance around a shape. The perimeter refers to the path traveled around the outside of some area. All polygons have a perimeter. Shapes that are not polygons also have a perimeter -- such as circles, semicircles, and the shapes of most letters.
outside
It is called the perimeter. How you calculate it depends upon the type of shape it is.
Circumference is only used for circles. Perimeter is for every other 2D shape.
The perimeter is both on the outside and the inside of a shape, as it is basically the outside wall/border of a shape and can therefore be viewed from the outside or the inside.
The perimeter is both on the outside and the inside of a shape, as it is basically the outside wall/border of a shape and can therefore be viewed from the outside or the inside.
Any plane shape can have the same perimeter as any other plane shape.
The outside of a shape.