Aljun S. Pinaca.

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Presentation transcript:

Aljun S. Pinaca

Review

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

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

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.

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

Example 1 Find 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 square given the side: s= 30 units s= 25.3 mm Find the side of the square given the perimeter: P= 27.53 cm P= 99 m

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

Generalization

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

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?

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.