Quadrilateral  Definition with Examples
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The polygon has four vertices or corners.
We can find the shape of quadrilaterals in various things around us, like in a chess board, a deck of cards, a kite, a tub of popcorn, a sign board and in an arrow.
Properties of a Quadrilateral:
 A quadrilateral has 4 sides, 4 angles and 4 vertices.
 A quadrilateral can be regular or irregular.
 The sum of all the interior angles of a quadrilateral is 360°.
Types of Quadrilaterals
Quadrilaterals can be classified into Parallelograms, Squares, Rectangles and Rhombuses. Square, Rectangle and Rhombus are also Parallelograms.
Here’s a list of the types of quadrilaterals with their name, pictures and properties:
Name of the Quadrilateral:  Picture of Quadrilateral:  Properties of the Quadrilateral: 
Parallelogram 
Opposite sides are parallel.
Opposites sides are equal.
Opposite angles are equal.


Square 
All sides are equal.
All angles are equal and measure 90°.


Rectangle 
Opposite sides are parallel.
Opposites sides are equal.
All angles are equal and measure 90°.


Rhombus

All sides are equal.
Opposite angles are equal.


Trapezoid 
Opposite sides are parallel.
Adjacent angles add up to 180°.

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