1. Warm-up Two silk worms had a race… they ended up in a tie! No matter how much you push the envelope, it’s still stationary!

2. Agenda 6-1 Quadrilaterals 6-2 Parallelograms Homework

3. Quadrilateral Parallelogram Rectangle Square Rhombus Trapezoid Isosceles Trapezoid

4. Chapter 6 – Exploring Quadrilaterals Definition – four-sided, closed polygons

5. Quadrilaterals Total measure of interior angles is 360.

6. Parallelograms

7. Parallelogram Theorems Theorem 6-1 Opposite sides of a parallelogram are congruent. Theorem 6-2 Opposite angles of a parallelogram are congruent. Theorem 6-3 Consecutive angles in a parallelogram are supplementary.

8. One more theorem Theorem 6-4 The diagonals of a parallelogram bisect each other.

9. All polygons with more than 3 sides have diagonals.

10. Example 1

11. Example 2

13. Tests for Parallelograms

18. Class work Page 295 #17-35

19. Homework Page 295 #17-26

20. Homework #27

21. Homework #28

22. Homework #29

23. Homework #30-32

24. Homework #33

25. Homework #34

26. Homework #35

27. Answers Ahead

28. 6-1 Study Guide

29. Homework 6-1 Study Guide and Practice 6-2 Study Guide and Practice