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.