A quadrilateral is a 4sided shape. We name quadrilaterals by looking at the properties of their angles and sides. These are examples of quadritalerals with the properties that give them their names.
Parallelogram

Rectangle

Square





Opposite angles are equal.

Opposite sides are equal and parallel.

 All angles 90º
 Opposite sides are equal and parallel.

 All angles 90º
 All sides equal.
 Opposite sides parallel.




Kite

Rhombus

Trapezium




 Two pairs of adjacent equal sides.
 One pair of opposite angle are equal.

 Opposite angles equal.
 Four equal sides.
 Opposite sides parallel.

 One pair of opposite sides parallel.

What name best describes this shape? 


There are two opposite sides that are both perpendicular to a third side. So, the two opposite sides are parallel to each other. This shape is best described as a trapezoid.
What name best describes this shape? 


Sides with matching hatch marks are congruent. This shape is best described as a kite.
What name best describes this shape? 


Sides with matching arrows are parallel. This shape is best described as a parallelogram.