### Definition of Quadrilaterals in Easy Words

*“A closed figure surrounded by four sides, is called a quadrilateral.”*

### Quadrilaterals characteristics

- Every quadrilateral has four sides.
- In a quadrilateral have four angles.
- The sum of all four interior angles of a quadrilateral is 360 degree.
- The sum of all four exterior angles of a quadrilateral is also 360 degree.
- A quadrilateral has four vertex.
- A quadrilateral has two diagonals.

### Classifying Quadrilaterals

Here we are given the types of quadrilaterals.

1. Trapezium

2. Parallelogram

3. Rhombus

4. Rectangle

5. Square

6. Kite

1. Trapezium

A quadrilateral in which a pair of sides is parallel, called Trapezium.

In the above figure we can see that side AB ।। CD.

2. Parallelogram

A quadrilateral whose opposite sides are parallel and equal is, called a parallelogram.

A parallelogram is a quadrilateral. The figure given above is a parallelogram.

Parallelogram has some special properties

- Opposite side are equal and parallel.

AB = CD and AD = BC

AB ।। CD and AD ।। BC - Opposite angles of parallelogram are equal.

∠A = ∠C and ∠B = ∠D - A parallelogram have two diagonal, which are intersect each other in equal parts.

OP = OR and OS = OQ

3. Rhombus

A quadrilateral whose all sides are equal and opposite sides are parallel, called Rhombus.

Rhombus has some special properties

- Each side are equal and opposite side are parallel.

AB = CD and AD = BC

AB ।। CD and AD ।। BC - Opposite angle are equal

∠A = ∠C and ∠C = ∠D - Both diagonal bisect each other vertically.

OP = ON = OQ = OM

4. Rectangle

You can read full article about rectangle to click here.

5. Square

You can read full article about square to click here.

6. Kite

Kite is a special type of a quadrilateral. The sides with the same marking in below figure are equal.

In the above figure we can see that AB = AD and BC = CD

A kite has 4 sides, so it is a quadrilateral.

There are exactly two distinct consecutive pairs of sides of equal length.