# What is a quadrilateral? type of quadrilateral

Friends, in today’s post you will get to learn about quadrilateral. It is a shape that is made up of four lines.

### What is a quadrilateral?

A plane closed figure made up of four line segments and has four sides, four vertices and four angles. to that shape **quadrilateral** it is said.

sum of the four interior angles of a quadrilateral **360° **it happens.

### type of quadrilateral

These are of the following types-

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#### 1.Square

A figure whose four sides are of equal length and each angle is 90 degrees, is called **square** it is said.

##### class formula

Area of square = side

Perimeter of square = 4 x side

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Diagonal of square = 2 side

#### 2.Rectangle

A figure with four sides, whose opposite sides are of equal length and each angle is 90 degrees, is called **rectangle** it is said.

##### rectangle formula

Area of rectangle = length x breadth

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Diagonal of rectangle = Length² + Breadth²

Perimeter of rectangle = 2 (length + breadth)

#### 3. Trapezium

The area bounded by four unequal sides on a plane whose two opposite sides are parallel and unequal is **trapezoid** It is called

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##### Trapezoidal Formula

Area of trapezium = (sum of two parallel sides x height)

#### 4. Parallelogram

The area on a plane bounded by four sides whose opposite sides are equal and parallel and hence their angles are equal, **parallelogram** It is called

##### parallelogram formula

Area of Parallelogram = Base x Breadth

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Perimeter of parallelogram = 2 × sum of corresponding sides

##### key point

- In a parallelogram, the opposite sides in each pair are equal.
- In a parallelogram, the opposite angles in each pair are equal.
- In a parallelogram, both the diagonals bisect each other.

#### 5.Rhombus

The area bounded by four sides on a plane whose opposite sides are equal and hence the angles of the opposite are equal, **rhombus** It is called

##### rhombus formula

Area of rhombus = (product of both the diagonals)

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Perimeter of rhombus = 4 x side

##### key point

- In a rhombus, all four sides are equal.
- The diagonals of a rhombus are perpendicular to each other.
- The opposite angles of a rhombus are equal.

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