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Quadrilaterals

Quadrilateral is a term used to describe all 4-sided 2D shapes. Examples of quadrilaterals include:

  • squares
  • rectangles
  • trapeziums
  • parallelograms
  • rhombuses
  • kites
  • irregular quadrilaterals

Quadrilaterals can be divided into two groups; parallelograms and other quadrilaterals.

Parallelograms

A quadrilateral is a parallelogram if both pairs of opposite sides are equal and parallel to each other.

Examples:


Rectangles, parallelograms, squares and rhombuses (diamonds) are all parallelograms as their opposite sides are equal in length and parallel.

Other quadrilaterals

Trapeziums and kites are not parallelograms.

A trapezium has 4 sides but only one pair of sides is parallel.

A kite does not have opposite sides that are equal or parallel.


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