is the sum of the measureof the side of a polygon

Perimeter of a triangleFormula: P= a+b+c

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.

Perimeter of a Square

A T H

V E M

I L O

ObjectivesAt the end of forty-five minute period, thestudents will be able to:

A. 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.

Perimeter of a Square

The formula is “P=4s”

Is the measurement around the square and it has four equal sides.

Example 1Find the perimeter of the square

with the side of 225m.

Solution:

P= 4s ; where s=225m

= 4(225m) [by substitution]

= 900m

Example 2

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

Find the perimeter of the squaregiven the side:

1. s= 30 units2. s= 25.3 mm

Find the side of the squaregiven the perimeter:

1. P= 27.53 cm2. P= 99 m

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

16 cm

Is the distance aroundThe outside of the Square

A Square has 4 sides ofEqual length.

The formula for finding thePerimeter of a square

Is 4*s or P= 4s

PerimeterOf a

square

Solve the following problems:1. A square garden is to be fenced. One side is 5

¾ m. how long the fence needed to surround it on all sides?

2. A decorative mat is a square. One side is 45.5cm. How long an edging is needed to put borders on it?

Find the Perimeter of:

A. A square with s= 2.8 cmA square with s= 0.66 cmA square with s= 1.5 m

AssignmentI- Find the Perimeter of:1. A square with s= 2 ½ meter2. A square with s= 3.5 cm3. A square with s= 2 ¾ cm4. A square with s= 6.8 m5. A square with s= 12 ½ cm

II- Research about the Circumference of a circle.