A presentation for Classroom Observations

1. MATHEMATICS IV

2. Who is absent?

3. Classroom
Rules

4. 1. Always listen,
AVOID CHATTING

5. 2. Always
Cooperate to your
respective group

6. 3. Raise your
hand if you
want to answer.

7. What did you
learned yesterday?

8. Let’s have a
surprise 

9. Get a piece of
paper under your
armchair.

10. Now, paste it on the its
respective place under the
three different classification of
triangle based on sides.

12. Find the sum of the
following 

13. 7+3+5=
15

14. 8+6+4=
18

15. 10+7+7=
24

16. 4+9+8=
21

17. 9+9+9=
27

18. 12+13+15=
40

19. 11+15+15=
41

21. You will make a fence for your triangular
vegetable garden . The sides measure 14
cm, 25 cm and 34 cm respectively. How
long the fence does you need for your
triangular vegetable garden?

22. A perimeter is the total
length of all sides of the plane
figure.
What is perimeter?

23. Formula on finding the
perimeter of Triangle:
s + s + s = n
or P = a + b + c

24. Lets try to solve this on the board 
You will make a fence for your triangular
vegetable garden . The sides measure 14 cm,
25 cm and 34 cm respectively. How long the
fence does you need for your triangular
vegetable garden?

25. Let’s have a game


26. - Will be group by 3 members each group.
- Each group will be given 1 blank triangle.
- Each group member will pick-up a number wuith a
corresponding length symbol on this box.
- The 3 numbers collected by the group will serve as the length
of the 3 sides of the triangle.
- The group will find the perimeter using the numbers.
- The group will send the photo of their answer with solution on
the Messenger Group Chat 
- The pointing system is based on first send first received
basis.

28. Share your learning


29. What is a perimeter?
What is our formula on finding the
perimeter of the triangle?
How important that we know the process
on solving perimeter?

31. Let’s have a
another game 

32. • The class will be divided into five groups, each group will select one
representatives.
• Each representative will pick-up triangle from the box
• Then, the group will measure the length of every sides of the triangle using
their ruler.
• They will find the perimeter of the triangle they measured.
• They will send the photo of their solution together their triangle on the group
chat.
• The group who presented their answer correctly will get a maximum of 20
points.

34. Let’s evaluate your
learning

35. Find the perimeter of the following.