2. LOGO Area and Perimeter of a Square By M.Veerasakdi

3. What shape is this?

4. The area of a square with sides of length 1cm is 1cm². The area of a square with sides of length 1cm is 1 cm².

5. The area of other squares can be found by counting squares or by multiplying the length of the sides.

6. The perimeter of a square is the total length of the four sides.

7. Example Question Look at the 7cm × 7cm square below: a) What is the area of the square? b) What is the perimeter of the square?

8. LOGO Area of Square Area of Square Area of Square Area of Square Square Area = a 2 Square a = length of side Square Square Perimeter = 4 x a Square a = length of side

9. Word Problem : Page 210. 4) Perimeter = 2 x(Length + Width) = 2 x ( 60 + 45 ) = 2 x ( 60 + 45 ) = 210 m. Ans.* = 210 m. Ans.*

10. 5) Area = Length x Width 96 = Length x 8 96 = Length x 8 96 ÷ 8 = Length 96 ÷ 8 = Length Length = 12 cm. Ans. Length = 12 cm. Ans.

11. 6 ) Perimeter = 2 x (Length + Width) 48 = 2 x (16+Width ) 48 = 2 x (16+Width ) 48 = 32 + 2 Width 48 = 32 + 2 Width (48 – 32) ÷ 2 = Width (48 – 32) ÷ 2 = Width Width = 8 cm. Ans. Width = 8 cm. Ans.

12. Exercise 13.2 Page 212 - 213 1)Perimeter = 4 x Length = 4 x 6 = 4 x 6 = 24 cm. Ans. = 24 cm. Ans. Area = Length x Length Area = Length x Length = 6 x 6 = 6 x 6 = 36 sq.cm. Ans. = 36 sq.cm. Ans.

13. 2 ) Perimeter = 4 x Length = 4 x 12 = 4 x 12 = - cm. Ans. = - cm. Ans. Area = Length x Length Area = Length x Length = 12 x 12 = 12 x 12 = - cm.sq. Ans. = - cm.sq. Ans.

14. 3 *) Perimeter = 4 x Length = 4 x 20 = 4 x 20 = - cm. Ans. = - cm. Ans. Area = Length x Length Area = Length x Length = 20 x 20 = 20 x 20 = - cm.sq. Ans.* = - cm.sq. Ans.*

15. 4 ) Perimeter = 4 x Length = 4 x 30 = 4 x 30 = - cm. Ans. = - cm. Ans. Area = Length x Length Area = Length x Length = 30 x30 = 30 x30 = - cm.sq. Ans. = - cm.sq. Ans.

16. NoLengthAreaPerimeter 1.1.1.1.86432 2.74928 3.52520 486432 5.63624 6.98136 7.1214448

17. NoLengthAreaPerimeter 8.98136 9.86432 10.41616

18. Solve the following …. Page 214-215 *1 ) Area = Length x Length = 5 x 5 = 5 x 5 = - cm. sq.Ans. = - cm. sq.Ans. 2 ) Area = Length x Length 64 = - x - 64 = - x - = 8 cm.Ans. = 8 cm.Ans.

19. 3 ) Area = Length x Length 225 = 15 x 15 225 = 15 x 15 Length = 15 cm.Ans. Length = 15 cm.Ans. Perimeter = 4 x Length = 4 x 15 = 4 x 15 = - cm.Ans. = - cm.Ans.

20. 4) Area = Length x Length 64 = - x - 64 = - x - Length = - m. Length = - m. 5 ) Perimeter = 56 2 times = 56 x 2 2 times = 56 x 2 = - m. = - m.

21. 6 ) Perimeter = 4 x Length 120 ÷ 4 = Length 120 ÷ 4 = Length - m. = Length Ans. - m. = Length Ans.

22. www.themegallery.com LOGO 6) Area = Length x Length = 30 x 30 = 30 x 30 = - m.sq. Ans. = - m.sq. Ans.

23. LOGO www.themegallery.com