Quadrilaterals
Polygons with four sides
Types of Quadrilaterals
 Square: Quadrilateral with four
equal sides and four right angles
(90 degrees)
Indicates equal sides
Box indicates 900 angle
Types of Quadrilaterals
 Rectangle: Quadrilateral with two
pairs of equal sides and four right
angles (90 degrees)
Indicates equal sides
Box indicates 900 angle
Types of Quadrilaterals
 Parallelogram: Quadrilateral with
opposite sides that are parallel and of
equal length and opposite angles are
equal
Indicates equal sides
Types of Quadrilaterals
 Rhombus: Parallelogram with four
equal sides and opposite angles equal
Indicates equal sides
Types of Quadrilaterals
 Trapezoid: Quadrilateral with one
pair of parallel sides
Parallel sides never
meet.
Types of Quadrilaterals
 Irregular shapes: Quadrilateral
with no equal sides and no equal
angles
Name the Quadrilaterals
1
2
rectangle
4
parallelogram
irregular
5
trapezoid
3
rhombus
6
square
Classifying Quadrilaterals
 Judging by appearance, classify each
quadrilateral in as many ways as possible:
Square
Rectangle
Rhombus
Parallelogram
Quadrilateral
Parallelogram
Quadrilateral
Classifying Quadrilaterals
 Judging by appearance, classify each
quadrilateral in as many ways as possible:
Rectangle
Parallelogram
Quadrilateral
Classifying Quadrilaterals
 Judging by appearance, classify each
quadrilateral in as many ways as possible:
Rhombus
Parallelogram
Quadrilateral
Trapezoid
Quadrilateral
Interior Angles
 Interior angles: An interior angle
(or internal angle) is an angle
formed by two sides of a simple
polygon that share an endpoint.
SUPER IMPORTANT!!!! MEMORIZE!
 Interior angles of a quadrilateral
always equal
360 degrees