### Definition of Quadrilaterals in Easy Words

“A closed figure surrounded by four sides, is called a quadrilateral.”
Quadrilaterals is a plan two dimensional geometric shape. It has only Length and Breadth. • 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.

Here we are given the types of quadrilaterals.
1. Trapezium
2. Parallelogram
3. Rhombus

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