Classifying Quadrilaterals

Math 2

Lowell Middle School

Mrs. MacDermaid

Quadrilateral• A quadrilateral is a

four-side polygon.

Special Quadrilaterals• Parallelogram

• Rectangle

• Rhombus

• Square

• Trapezoid

Parallelogram• Both pairs of opposite sides

are parallel and congruent. Both pairs of opposite angels are congruent.

Rectangle• Parallelogram with four right

angles.

Rhombus• Parallelogram with four

congruent sides

Square• Parallelogram with four

congruent sides and four right angles.

Trapezoid• Exactly one pair of opposite

sides is parallel.

Classifying Quadrilaterals• Quadrilaterals can have more

than one name because the special quadrilaterals sometimes share properties.

• The best name is the one that is the most specific.

How the Quadrilaterals are Related(Venn Diagram)

Parallelograms

Squares

Rectangles

Rhombuses

Quadrilaterals

Trapezoids

How the Quadrilaterals are Related(Concept Map)

Parallelograms

Squares

RectanglesRhombuses

Quadrilaterals

TrapezoidsOther

Try This!• Give all the names that apply to each

quadrilateral. Then give the name that best describes it.

Try This!• Give all the names that apply to each

quadrilateral. Then give the name that best describes it.

• The figures has opposite sides that are parallel so it is a parallelogram.

• The figures has four right angles, so it is a rectangle.

• Rectangle is more specific so it is the best name.

Try This!• Give all the names that apply to each

quadrilateral. Then give the name that best describes it.

Try This!• Give all the names that apply to each

quadrilateral. Then give the name that best describes it.

• The figures has exactly one pair of opposite sides that is parallel, so it is a trapezoid..

• Trapezoid is the name that best describes this quadrilateral.

Clip Art Credits

• Slide #2 Microsoft Office Clip Art Galleryhttp://office.microsoft.com/en-us/images/results.aspx?qu=geometric%20shapes#ai:MC900048066|

http://office.microsoft.com/en-us/images/results.aspx?qu=geometric%20shapes#ai:MC900048064|

http://office.microsoft.com/en-us/images/results.aspx?qu=geometric%20shapes#ai:MC900048068|

http://office.microsoft.com/en-us/images/results.aspx?qu=geometric%20shapes#ai:MC900048065

• All other SlidesOriginal line drawings by Sharon MacDermaid