## Main Difference

The main difference between Area and Perimeter is that the **Area is a quantity that expresses the extent of a two-dimensional surface or shape, or planar lamina, in the plane** and **Perimeter is a path that surrounds an area**

Area

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analog of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept).

The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number.

There are several well-known formulas for the areas of simple shapes such as triangles, rectangles, and circles. Using these formulas, the area of any polygon can be found by dividing the polygon into triangles. For shapes with curved boundary, calculus is usually required to compute the area. Indeed, the problem of determining the area of plane figures was a major motivation for the historical development of calculus.For a solid shape such as a sphere, cone, or cylinder, the area of its boundary surface is called the surface area. Formulas for the surface areas of simple shapes were computed by the ancient Greeks, but computing the surface area of a more complicated shape usually requires multivariable calculus.

Area plays an important role in modern mathematics. In addition to its obvious importance in geometry and calculus, area is related to the definition of determinants in linear algebra, and is a basic property of surfaces in differential geometry. In analysis, the area of a subset of the plane is defined using Lebesgue measure, though not every subset is measurable. In general, area in higher mathematics is seen as a special case of volume for two-dimensional regions.Area can be defined through the use of axioms, defining it as a function of a collection of certain plane figures to the set of real numbers. It can be proved that such a function exists.

Perimeter

A perimeter is a path that surrounds a two-dimensional shape. The term may be used either for the path or its lengthâ€”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. A calculated perimeter is the length of fence required to surround a yard or garden. The perimeter of a wheel (its circumference) describes how far it will roll in one revolution. Similarly, the amount of string wound around a spool is related to the spool’s perimeter.

**Wikipedia**

Area (noun)

A measure of the extent of a surface; it is measured in square units.

Area (noun)

A particular geographic region.

Area (noun)

Any particular extent of surface, especially an empty or unused extent.

“The photo is a little dark in that area.”

Area (noun)

The extent, scope, or range of an object or concept.

“The plans are a bit vague in that area.”

Area (noun)

An open space, below ground level, between the front of a house and the pavement.

“title=The Adventure of the Bruce-Partington Plans|passage=We sprang through into the dark passage, closing the area door behind us.”

Area (noun)

Penalty box; penalty area.

Area (noun)

Genitals.

Perimeter (noun)

The sum of the distance of all the lengths of the sides of an object.

Perimeter (noun)

The length of such a boundary.

Perimeter (noun)

The outer limits of an area. circumference

Perimeter (noun)

A fortified strip or boundary usually protecting a military position.

Perimeter (noun)

An instrument for determining the extent and shape of the field of vision.

**Wiktionary**

Perimeter (noun)

the continuous line forming the boundary of a closed geometrical figure

“the perimeter of a rectangle”

Perimeter (noun)

the outermost parts or boundary of an area or object

“a perimeter fence”

“the perimeter of the garden”

Perimeter (noun)

an area away from the basket, beyond the reach of the defensive team

“he was very patient in working the ball around the perimeter”

Perimeter (noun)

an instrument for measuring the extent and characteristics of a person’s field of vision.

**Oxford Dictionary**