What is Rectangle?

A rectangle is a 2D shape in geometry, having 4 sides and 4 corners. Its two sides meet at right angles. Thus, a rectangle has 4 angles, each measuring 90 ̊. The opposite sides of a rectangle have the same lengths and are parallel. Two sides are said to be parallel, when the distance between them remains the same at all points.

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Other names of the rectangle

Since all the angles of a rectangle are equal, we also call it an equiangular quadrilateral.

Equiangular Quadrilateral

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Parallelogram

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Properties of a rectangle:

It is a flat shape

It has 4 sides (edges)

It has 4 corners (vertices)

It has 4 right angles

Area of a rectangle:

The area of a rectangle is the product of its two adjacent sides

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Area of a rectangle = Length × Width

Perimeter:

The perimeter of a rectangle is the sum of the length of its four sides. Since parallel sides of a rectangle have the same length, the formula for the perimeter of a rectangle is

Perimeter of a rectangle = Length + Width +Length + Width

=2 length +2Width

=2 (length +Width)

Diagonals of a rectangle:

The line segments that join the opposite corners of a rectangle are called its diagonals. In the given figure, the two diagonals of the rectangle are AC and BD. The diagonals of a rectangle are the same in length.

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Therefore, AC = BD

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Rectangle being the most common shape forms a part of our day to day life. Some real-life examples of the rectangle are table tops, books, mobile phones, TV, etc.

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Fun Facts

All rectangles are parallelograms, but all parallelograms are not rectangles

The diagonals of a rectangle divide the rectangle into four triangles