Perimeter And Area Of Quadrilateral

Technology for Education Project under DE Programming

Presented by Mrs. Sandeep Kaur Math Mistress Govt Sec. School,Talhan JALANDHAR

Perimeter and Area of Quadrilateral

Objectives  To create the interest of the students in

Menstruation  Clear the concepts regarding AREA and PERIMETER  To familiar the various figures

P.K.Testing

Identify the figures ?

Quadrilateral Family

parallelogram trapezoid

rhombus

rectangle

square

Content of the project  Definition of Perimeter  How to find Perimeter of Quadrilateral

family  Definition of Area  How to find Area of Quadrilateral

family

Definition

Perimeter – (P) The

distance around a figure. 9 cm

5cm 9cm.

5 9 5cm 5 +9 28 cm.

Find the perimeter 9 cm.

9 9 cm. 9 cm. 9 9 +9 36 cm. 9 cm. A shortcut for the square is 4 x side.

Find the perimeter 7 cm.

9 cm.

7 cm.

9 9 cm. 7 9 +7 36 cm.

Find the perimeter 10cm. 10cm

6cm

10 10cm 6 . 10 + 10 36cm.

Find the perimeter 18 m. 12 m.

11 m.

12 15 m. 11 15 + 18 56 m.

Definition

Area – (A) the measure, in square units, of the surface of a figure.

The area of this rectangle is 8 squares.

How to find the area of a square or rectangle. Step 1 – Multiply the length times the width. (Area = Length x Width)

5 x3 15

3 cm. 5 cm.

How to find the area of a square or rectangle. Step 2 – Indicate that the answer is in square centimeters by writing the exponent 2 after the unit of measure. 3 cm. 5 cm.

5 x3 2 15 cm.

How to find the area of a square or rectangle. Step 3 – Read the answer: 15 square centimeters.

3 cm. 5 cm.

5 x3 2 15 cm.

What is the area? 5 m.

5 x6 2 30 m. 6 m. You say: 30 square meter

What is the area? 2 cm. 6 cm.

2 x6 2 12 cm.

You say: 12 square Centimeter

What is the area?

7 x4 2 28 m.

4 m.

7 m. You say: 28 square meters.

How to find the area of a parallelogram

Step 1 – Multiply the base times the height. (A = b x h) height

90º base

How to find the area of a parallelogram

Step 1 – Multiply the base times the 2 height. (A = b x h) height 13cm.

90º base 17cm.

13 x 17

91 +13

221

How to find the area of a parallelogram

Step 2 – Indicate that the answer is in square centimeters by writing the exponent 2 after the unit of measure. 13 x 17 height 91 13cm. 90º + 13 base 17cm.

221 cm

2

How to check the area of a parallelogram height 2 cm.

90º base 4 cm. 4 x 2 = 8 cm.2 First find the area.

How to check the area of a parallelogram 4 x 2 = 8 cm.2 height 2 cm.

90º base 4 cm.

Cut off the piece at the dotted line.

How to check the area of a parallelogram 4 x 2 = 8 cm.2 height 2 cm.

90º base 4 cm.

Cut off the piece at the dotted line.

How to check the area of a parallelogram 4 x 2 = 8 cm.2 height 2 cm.

90º base 4 cm.

Move this piece to the other side.

How to check the area of a parallelogram 4 x 2 = 8 cm.2 height 2 cm.

90º base 4 cm.

Move this piece to the other side.

How to check the area of a parallelogram 4 x 2 = 8 cm.2 height 2 cm.

90º base 4 cm.

Now you have a rectangle 4 x 2 cm.

How to check the area of a parallelogram 4 x 2 = 8 cm.2 width 2 cm. length 4 cm. What is the area of this rectangle?

How to check the area of a parallelogram 4 x 2 = 8 cm.2 width 2 cm. length 4 cm. That’s right! 8 cm.2 The same as the parallelogram.

What is the area of this parallelogram? height 5 cm.

5 x7 2 35 cm.

base 7 cm. You say: 35 square centimeters

What is the area of this parallelogram? height 5 m.

5 x6 2 30 m. base 6 m. You say: 30 square meter

What is the area of this parallelogram? height 10 m.

10 x5 2 50 m. base 5 m. You say: 50 square meters.

Query session 1.

Find out the perimeter of the following figure 6 cm. 9 cm.

2.Find the area of parallelogram in square cm whose base is 150 cm and height is 24 cm. 3. Area of rhombus = base x ______ .

Acknowledgement I am

thankful to the Principal of Talhan and DE training under AIF for giving us a chance to learn about the computer in this institute.  I am also thankful to Miss Rekha Chaudhary Computer Faculty,Talhan for giving us guidance and knowledge of computer.