Common Core Math Vocabulary

Quadrilateral - Definition with Examples

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What is a quadrilateral? 
In geometry, a quadrilateral can be defined as a closed,  two-dimensional shape which has four straight sides

The polygon has four vertices or corners.

Quadrilateral – 4-sided polygon

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.

Quadrilateral real-life examples we see around us

 

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.

Types of Quadrilaterals - Relativity

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 parllelogram
 Opposite sides are parallel.
 Opposites sides are equal.
 Opposite angles are equal.
 Square square
 All sides are equal.
 All angles are equal and measure 90°.
 Rectangle rectangle
 Opposite sides are parallel.
 Opposites sides are equal.
 All angles are equal and measure 90°.
 Rhombus
rhombus
 All sides are equal.
 Opposite angles are equal.
 Trapezoid trapezoid
 Opposite sides are parallel.
 Adjacent angles add up to 180°.
 

Fun Facts

  • The word quadrilateral has originated from two Latin words quadri which means “four” and, latus meaning “side”. 
 

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Four sides and, so are the corners four,
Find a quadrilateral on the bathroom floor.
You may see another in the wooden door,
Or in the boat and oars, near the seashore!!
 

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Instead of handing out quadrilateral colouring worksheets to your children, ask them to observe and note the things in the shape of regular and irregular quadrilaterals, such as in a television, a laptop, a book or in a kite. Further, you can discuss and show videos to review the properties of different quadrilaterals. 
 

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