1. Aljun S. Pinaca

2. Review

3. is the sum of the measure Perimeter of a triangle
of the side of a polygon
Perimeter of a triangle
Formula: P= a+b+c

4. Find the Perimeter of a triangle using its formula:
1. whose sides 3.84 cm, 6.23cm, 5.6cm.
2. whose sides 97.4 cm, 85.6, 113 cm.

5. Perimeter of a Square A T H V E M I L O

6. Objectives At the end of forty-five minute period, the
students will be able to:
master the concept in solving the perimeter
of the square;
B. give evidences to prove the usefulness in solving perimeter of a square in real life situation; and
C. manipulate well in dealing certain things or objects.

7. Perimeter of a Square
Is the measurement around the square and it has four equal sides.
The formula is “P=4s”

8. Example 1 Find the perimeter of the square with the side of 225m.
Solution:
P= 4s ; where s=225m
= 4(225m) [by substitution]
= 900m

9. Example 2
Find the perimeter of the square with the side of 5/2 cm.

10. Find the perimeter of the square given the side:
s= 30 units
s= 25.3 mm
Find the side of the square given the perimeter:
P= cm
P= 99 m

11. 1. The diagonal of a square is 16 cm long find its perimeter.

12. Generalization

13. Perimeter Of a square Is the distance around The outside of the Square
A Square has 4 sides of
Equal length.
The formula for finding the
Perimeter of a square
Is 4*s or P= 4s

14. Solve the following problems:
Find the Perimeter of:
A square with s= 2.8 cm A square with s= 0.66 cm A square with s= 1.5 m
Solve the following problems:
A square garden is to be fenced. One side is 5 ¾ m. how long the fence needed to surround it on all sides?
A decorative mat is a square. One side is 45.5cm. How long an edging is needed to put borders on it?

15. Assignment I- Find the Perimeter of: A square with s= 2 ½ meter
A square with s= 3.5 cm
A square with s= 2 ¾ cm
A square with s= 6.8 m
A square with s= 12 ½ cm
II- Research about the Circumference
of a circle.