**Rectangle Calculator**

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## Definition

**Rectangle** is a two dimensional (2D) geometric shape. A rectangle is a four-sided flat shape where every angle is a right angle. The two opposite sides are equal in length and the two adjacent sides are unequal.

**Square:**This is a rectangle when the adjacent sides are also equal ie all the sides are equal.**Parallelogram:**this is a rectangle with the difference being that the internal angles are not right angles. Opposite angles are equal.

## Formula

__RECTANGLE__

** Area: **of a Cone is claculated by the formula:

**Long Side * Short Side**

** Perimeter: **This is calculated by the formula:

**2 * (Long Side + Short Side)**

** Diagonal: **Diagonals of a rectangle are equal in length and is calculated by the formula:

**√(Long Side² + Short Side²)**

## Measurement Units

** Meter (m): **is the base unit of length in the International System of Units (SI). Metre is defined as the distance travelled by light in a specific fraction (1299 792 458) of a second.

** Other SI units:** are millimeter (mm) ie 1/1000 of m, centimeter (cm) which is 1/100 of m and kilometer (km) which is equal to 1000m.

__Other English units of measure of distance are__:

** Mile**: An English unit of length, it is equal to 1609 meters (m).

__: It is equal to 0.9144 meters (m).__

**Yard**__: It is equal to 0.3048 meters (m).__

**Foot**