G3_MATH-Session-5_Q3W5(Area and Perimeter).pptx

Area and Perimeter

1. Same Perimeter, Different Areas SESSION 5

2. WARM UP https://www.youtube.com/watch?v=4WStzHyZ3_0

3. PRE-ASSESSMENT Find the perimeter and the area. Tell which rectangle has a greater area.

4. PRE-ASSESSMENT Find the perimeter and the area. Tell which rectangle has a greater area.

5. OBJECTIVES Differentiate area from perimeter. Use area to compare rectangles with the same perimeter. Draw rectangles with the same perimeter and different areas.

6. SUCCESS CRITERIA I can differentiate area from perimeter. I can use area to compare rectangles with the same perimeter. I can draw rectangles with the same perimeter and different areas.

7. VOCABULAR Per i Y m e ter Formula Length Width Rectangle

8. MAIN TEACHING

9. What is an area? MAIN TEACHING Let's recall. Area is the measure of the number of unit squares needed to cover a flat surface.

10. MAIN TEACHING Let's recall. What is the formula in finding the perimeter of a rectangle?

11. MAIN TEACHING Let's have a GUESSING GAME if you answer Letter A you have to stand up , but if your answer is Letter B just raised your hand .

12. MAIN TEACHING Compare the two image of a rectangle and Tell which rectangle has a greater area.

13. MAIN TEACHING

14. MAIN TEACHING Tell which rectangle has a greater area. Letter A or B.

15. MAIN TEACHING Answer: Letter B

16. MAIN TEACHING Tell which rectangle has a greater area. Letter A or B.

17. MAIN TEACHING Answer: Letter B

18. MAIN TEACHING Tell which rectangle has a greater area. Letter A or B.

19. MAIN TEACHING Answer: Letter A

20. MAIN TEACHING Now, let's recall how to get the perimeter of a rectangle. Tell which rectangle has a greater perimeter.

21. MAIN TEACHING Now, let's recall how to get the perimeter of a rectangle. Tell which rectangle has a greater perimeter. Answer: A= 16 units B= 16 units both have the same p

22. MAIN TEACHING Now, let's recall how to get the area of a rectangle. Tell which rectangle has a greater AREA. Any volunteer?

23. MAIN TEACHING Now, let's recall how to get the area of a rectangle. Tell which rectangle has a greater AREA. Answer: A - 20 square units B - 18 square units

24. MAIN TEACHING Let's solve a word problem. Yuri has 12 feet of boards to put around a rectangular sandbox. How long should he make each side so that the area of the sandbox is as large as possible?

25. MAIN TEACHING

26. MAIN TEACHING

27. MAIN TEACHING

28. Display the table for Perimeter and Area on the board for students to copy and complete. Investigate Materials 1- Inch Grid Paper Draw a rectangle on grid paper that has a length of 6 units and a width of 2 units. Record the perimeter and area in the table on the right. For Rectangle 2, multiply the length and width by 2. Record the length and width in the table. Record the perimeter and area in the table for Rectangle 2. Divide the length and width of Rectangle 1 by 2. Record this length and width in the table for Rectangle 3. Record the perimeter and area in the table for Rectangle 3. MAIN TEACHING GROUP ACTIVITY

29. Display the table for Perimeter and Area on the board for students to copy and complete. Investigate Materials 1- Inch Grid Paper Draw a rectangle on grid paper that has a length of 6 units and a width of 2 units. Record the perimeter and area in the table on the right. For Rectangle 2, multiply the length and width by 2. Record the length and width in the table. Record the perimeter and area in the table for Rectangle 2. Divide the length and width of Rectangle 1 by 2. Record this length and width in the table for Rectangle 3. Record the perimeter and area in the table for Rectangle 3. MAIN TEACHING GROUP ACTIVITY

30. UAE INTEGRATION Ahmed’s and Abood’s bedrooms are shaped like rectangles. Ahmed’s bedroom is 9 feet long and 8 feet wide. Abood’s bedroom is 7 feet long and 10 feet wide. Whose bedroom has the greater area? Explain. Answer: Ahmed’s; 9 × 8 = 72 and 7 × 10 = 70;

31. TASK TIME!

32. PLENARY Find the perimeter and the area. Tell which rectangle has a greater area.

33. PLENARY Find the perimeter and the area. Tell which rectangle has a greater area.