This document contains a lesson on identifying and classifying quadrilaterals. It discusses the key properties of different types of quadrilaterals including squares, rectangles, rhombi, parallelograms, and trapezoids. Students are asked to sketch and compare different quadrilaterals based on their sides and angles in order to understand how to identify each type of quadrilateral.

1. Quadrilaterals

2. Today’s Lesson Title new page: Quadrilaterals Date: 10/13/09 Get a calculator!

3. Review – Stem & Leaf

4. Yesterday’s Assignment On overhead Given 28 squares for the perimeter, make a garden with the biggest area.

5. Essential Question How can I identify and describe quadrilaterials?

6. Quadrilaterals Sketch the ones you see in your notes. We’ll talk about them later.

7. Quadrilateral:

8. Quadrilateral:

9. Quadrilateral:

10. Quadrilateral:

11. Quadrilateral:

12. Quadrilateral:

13. Quadrilateral What do they all have in common? What differences did you see?

14. Square:

15. Square: Sides? 4 equal Both sets parallel Angles? All are 90o

16. Rhombus:

17. Rhombus: Sides? 4 equal Both sets parallel Angles? 2 obtuse, 2 acute

18. Rectangle:

19. Rhombus: Sides? Opposites equal Both sets parallel Angles? All are 90o

20. Parallelogram:

21. Parallelogram: Sides? Opposites equal Both sets parallel Angles? 2 obtuse, 2 acute

22. Trapezoid:

23. Trapezoid: Sides? One set parallel Angles? 2 obtuse, 2 acute (in this one)

24. Trapezoid:

25. Angle Measures: What do you think the total angle measurement is for a quadrilateral?

26. Trapezoid:

27. Essential Question How can I identify and describe quadrilaterals by their sides and angles?

28. Assignment: Sorting quadrilaterals. Use chart Identify each shape as one of the quadrilaterals or just quadrilateral

29. More Problems: Quiz on non-calculator items. Model drawing if time.