Classifying
Quadrilaterals
Quadrilateral

A polygon that has four sides
 The prefix quad means four

Ex: quadruplets, quadrants, quarters
Types of Quadrilaterals
– a quadrilateral with both
pairs of opposite sides parallel.
 Parallelogram
– a parallelogram with 4
congruent sides
 Rhombus
Types of Quadrilaterals
 Rectangle
– a parallelogram with 4 right
angles
– a parallelogram with four right
angles and four congruent sides
 Square
Types of Quadrilaterals

Kite – a quadrilateral with two pairs of adjacent
sides congruent and no opposite sides
congruent
Types of Quadrilaterals
– a quadrilateral with exactly
one pair of parallel sides
 Trapezoid
Trapezoid – a trapezoid whose
nonparallel sides are congruent
 Isosceles
Hierarchy of Quadrilaterals:
the quadrilateral family tree
Grandma
Mom
Uncle
Aunt
Brother
Cousin
Sister
Baby
Examples
 Classify
these quadrilaterals
Parallelogram
Rhombus
Examples
Rectangle
Kite
True or False
All squares are rectangles.
1.

True
A trapezoid is a parallelogram.
2.

False
Some parallelograms are squares.
3.

True
All rectangles are squares.
4.

False