Quadrangles

 

Quadrangles are 4-sided polygons. There are several types of quadrilaterals. We can classify them by the number of pairs of parallel sides.


This tree digram shows how the different types of quadrangles are related. For example, quadrangles are divided into two major groups - parallelograms and not parallelograms.

QUADRANGLES

(all 4 sided polygons)





NOT PARALLELOGRAMS

(less than 2 pair of parallel sides)

PARALLELOGRAMS

(2 pair of parallel sides)

RECTANGLES

4 right angles

opposite sides =

RHOMBUSES

4 = sides

angles do not need to be right angles

SQUARES

4 right angles

4 = sides

TRAPEZOIDS

exactly 1 pair

parallel sides

KITE

2 pairs = sides


no parallel sides


= sides are

next to each other


4 sides cannot all be =

OTHER

any quadrangle that is not a

parallelogram,

trapezoid, or

kite