1. In this video, you will learn how to view one or more parts of an expression as a single entity, by using the associative property to analyze the formula for a rectangle’s perimeter.

2. perimeter – measurement of the distance around the outside of a polygon or a circle example: 4 x 5 = 2 x 10

3. rectangle – a parallelogram with four right angles, as well as two pairs of parallel, congruent sides

6. Rectangle Perimeter Formula, #1 l l w w

7. l l w w p = l + l + w + w

8. The Associative Property When three or more values are added, the sum is the same regardless of the grouping of the values

9. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

10. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

11. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

12. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

13. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

14. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

15. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

16. Rectangle Perimeter Formula, #2 l l w w p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w

17. Rectangle Perimeter Formula, #3 p = l + l + w + w p = (l + l) + (w + w) p = 2l + 2w l ww l

18. The Associative Property When three or more values are added, the sum is the same regardless of the grouping of the values

19. Rectangle Perimeter Formula, #3 p = l + l + w + w p = (l + w) + (l + w) p = (l + l) + (w + w) p = 2l + 2w l ww l

20. Rectangle Perimeter Formula, #3 p = l + l + w + w p = (l + w) + (l + w) p = 2(l + w) p = (l + l) + (w + w) p = 2l + 2w l ww l

21. Rectangle Perimeter Formula, #3 p = l + l + w + w p = (l + w) + (l + w) p = 2(l + w) p = (l + l) + (w + w) p = 2l + 2w l ww l

22. Rectangle Perimeter Formula, #3 p = l + l + w + w p = (l + w) + (l + w) p = 2(l + w) p = (l + l) + (w + w) p = 2l + 2w l ww l

23. Rectangle Perimeter Formula, #3 p = l + l + w + w p = (l + w) + (l + w) p = 2(l + w) p = (l + l) + (w + w) p = 2l + 2w l ww l

24. Synopsis p = l + l + w + w p = 2l + 2w p = 2(l + w)

25. In this video, you learned how to view one or more parts of an expression as a single entity, by using the associative property to analyze the formula for a rectangle’s perimeter.