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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 Gallery
http://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 Slides
Original line drawings by Sharon MacDermaid

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Quadrilaterals

  • 2. Quadrilateral • A quadrilateral is a four-side polygon.
  • 3. Special Quadrilaterals • Parallelogram • Rectangle • Rhombus • Square • Trapezoid
  • 4. Parallelogram • Both pairs of opposite sides are parallel and congruent. Both pairs of opposite angels are congruent.
  • 5. Rectangle • Parallelogram with four right angles.
  • 6. Rhombus • Parallelogram with four congruent sides
  • 7. Square • Parallelogram with four congruent sides and four right angles.
  • 8. Trapezoid • Exactly one pair of opposite sides is parallel.
  • 9. 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.
  • 10. How the Quadrilaterals are Related (Venn Diagram) Parallelograms Squares Rectangles Rhombuses Quadrilaterals Trapezoids
  • 11. How the Quadrilaterals are Related (Concept Map) Parallelograms Squares RectanglesRhombuses Quadrilaterals TrapezoidsOther
  • 12. Try This! • Give all the names that apply to each quadrilateral. Then give the name that best describes it.
  • 13. 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.
  • 14. Try This! • Give all the names that apply to each quadrilateral. Then give the name that best describes it.
  • 15. 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.
  • 16. Clip Art Credits • Slide #2 Microsoft Office Clip Art Gallery http://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 Slides Original line drawings by Sharon MacDermaid