Kungfu math p3 slide13 (area)pdf

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Transcript of Kungfu math p3 slide13 (area)pdf

  • 1. Measurement AreaWhat will we learn today? concepts of area and perimeter of a plane figure measurement of area in square units measurement of area in square centimetres
  • 2. What is Area?Area is the size of a surface.
  • 3. Area of Simple ShapesThere are special formulas for certain shapes:For example: What is the area of this rectangle? 3cm 5cm
  • 4. Area of Simple ShapesThere are special formulas for certain shapes:For example: What is the area of this rectangle? Area = Length x Breadth 3cm 5cm
  • 5. Area of Simple Shapes What is the area of this rectangle? Area = Length x BreadthLength is the longest dimension of an object. 3cm Length 5cm
  • 6. Area of Simple Shapes What is the area of this rectangle? Area = Length x BreadthBreadth is the extent or measure of how broador wide something is. Breadth 3cm 5cm
  • 7. Area of Simple Shapes What is the area of this rectangle? Area = Length x BreadthLength is the longest dimension of an object.Breadth is the extent or measure of how broador wide something is. Breadth 3cm Length 5cm
  • 8. Area of Simple ShapesTherefore, by applying the formula. What is the area of this rectangle?Area of rectangle = Length x Breadth 3cm 5cm
  • 9. Area of Simple ShapesTherefore, by applying the formula. What is the area of this rectangle?Area of rectangle = Length x Breadth = 5cm x 3cm 3cm 5cm
  • 10. Area of Simple ShapesTherefore, by applying the formula. What is the area of this rectangle?Area of rectangle = Length x Breadth = 5cm x 3cm = 15 cm 3cm 5cm
  • 11. Area of Simple ShapesTherefore, by applying the formula. What is the area of this rectangle?Area of rectangle = Length x Breadth = 5cm x 3cm Notice the = 15 cm difference in units? 3cm 5cm
  • 12. Area of Simple ShapesTherefore, by applying the formula. What is the area of this rectangle?Area of rectangle = Length x Breadth = 5cm x 3cm = 15 cm The unit for AREA is cm or m
  • 13. SummaryYou can only find area when the length andbreadth have the same units.For example,the length is 5 cm and the breadth is 4 cm.The area will be 20 cm.
  • 14. SummaryYou can only find area when the length andbreadth have the same units.For example,the length is 5 m and the breadth is 4 m.The area will be 20m.
  • 15. Study Figures A and B carefully.
  • 16. We need to count the number of squares inorder to find the area of Figures A and B.
  • 17. Lets look at Figure A. 1 2 3 4 5 6 77 complete squares.
  • 18. Lets look at Figure A. 2 triangles form 1 1 complete 2 square. 3 4 5 6 77 complete squares.
  • 19. Figure A is made up of 8 complete squares.
  • 20. Lets look at Figure B. 10 complete squares. 1 6 2 7 3 8 4 9 5 10 2 triangles form 1 complete square.
  • 21. Figure B is made up of 11 complete squares.
  • 22. Are you ready to try out the questions?
  • 23. Visit kungfumath.sg today!