Rajuk uttara model college md saifur rahman

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Rajuk uttara model college md saifur rahman

  1. 1. MD Saifur Rahman Lecturer (Mathematics) RAJUK Uttara Model College
  2. 2. Welcome To Math Class
  3. 4. (a +b) 2 = a 2 + 2ab + b 2 (a -b) 2 = a 2 - 2ab + b 2 (a +b) 3 = a 3 + 3a 2 b + 3ab 2 +b 3 (a -b) 3 = a 3 - 3a 2 b + 3ab 2 -b 3 Area of circle  r 2 Circumference of circle 2  r Surface area of cone  rl Volume of cylinder  r 2 h Volume of cone 1/3  r 2 h Surface area of cylinder 2  rh +  r 2
  4. 5. Bangladesh Parliament Nehru centre
  5. 6. Cylinder
  6. 7. Yakhchal of Yazd province
  7. 8. Cone
  8. 10. Learning Outcomes Students will be able to Measure the surface area of a cylinder and a cone Find out the volume of a cylinder and a cone Identify the shape of the surface of a cylinder and a cone
  9. 11. Identify Cone and Cylinder shapes in the following Rocket Glass Tent Water Tank
  10. 12. How many surfaces are there ? How many parts are there to color in this candle ?
  11. 13.  r 2  r 2 2  r h 2  rh Surface Area
  12. 14. h Radius, r Volume = Area of base × height =  r 2 × h
  13. 15. The length and the breadth of a book is 25 cm and 15 cm. When it revolves around the greatest side then find the surface area and volume of that solid. 25 cm 15 cm Problem : 1 ( Pair work)
  14. 16. Greatest side Rectangle Cylinder
  15. 17. ` Height, h Radius, r Slant length, l Slant length, l Circumference , 2 πr
  16. 18. Slant length, l Slant length, l a a b c d e f g h i j k l m n o p q Total Area = ½ la + ½ lb + ½ lc +……………….+ ½lq Total Area = ½ l (a + b + c + d+ ….. +q) Total Area = ½ l ( 2 πr ) = πlr Area = Area =  Base  Height  l  a
  17. 19.  rl Surface Area  r 2
  18. 20. Volume
  19. 21. Two sides of a right angle triangle are 5 cm and 3.5 cm. If the triangle revolves around its longest side then find the surface area and volume of the solid shape formed. 5 cm 3.5cm Problem : 2 (Individual Work)
  20. 22. Right angle triangle Cone
  21. 23. Group Work The height of a cone-shaped tent is 7.5 m. How much canvas is needed to cover 2000 square metres of land?
  22. 24. Home Work Every student should create a problem related to a Cone or Cylinder & bring it to the next class so other students can try to solve it.
  23. 25. http://www.youtube.com/watch?v=WCqrWM261r0 www.google.bd.com/image Acknowledgement
  24. 26. Thanks All To

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