Area
- 2. Which book needs more space? The Atlas needs more space because it has a bigger surface.
- 3. Which shape needs more space? The yellow one needs more space.
- 4. Which object needs more space? Blackboard Student’s desk The amount of surface covered by the blackboard is called the area.
- 5. Which shape has the larger area? Sometimes it is difficult to tell. So what do we need to do?
- 6. We can use small squares to cover small objects. We can use sheets of newspaper to cover larger surfaces.
- 7. How can we find the area of a shape which has been drawn on squared paper? The area of the shape can be found by ticking the square as each one is counted.
- 8. 12 Area = _____ square units.
- 9. 16 Area = _____ square units.
- 10. 20 Area = _____ square units.
- 11. 24 Area = _____ square units.
- 12. Find the area of these shapes. Different shapes can have same area.
- 13. Shapes can be made up of whole squares and half squares. Two halves make up one whole square.
- 14. Letter E has 15 whole squares and 1 half square. Area = 15 ½ square units
- 15. Letter A has: 14 whole squares 2 half squares (2 halves make 1 whole square) Area = 14 + 1 square units = 15 square units
- 16. This shape has: 20 whole squares 12 half squares (2 halves make 1 whole square) 12 half squares = 6 whole squares Area = 20 + 6 square units = 26 square units
- 17. 20 4 ___ whole squares + ___ half squares 22 Area = _____ square units.
- 18. 16 6 ___ whole squares + ___ half squares 19 Area = _____ square units.
- 19. Area of letters and shapes can be found by using the nailboard.
- 20. To take measurements we can use the: • metre ruler • measuring tape • trundle wheel • ruler
- 21. 1 square represents 1 cm 26 Area = _____ square centimetres.
- 22. 1 square represents 1 cm 24 4 ___ whole squares + ___ half squares 26 Area = _____ square centimetres.
- 23. Area= 6.5 cm x 4 cm = 26 cm2 1 square represents 1 cm 26 Area = _____ cm2.
- 24. length breadth Area = length x breadth
- 25. 11 cm 7 cm Area = length x breadth = 11 cm x 7 cm = 77 cm2
- 26. Length Breadth Area 6cm 5cm 30cm2 5cm 4cm 20cm2 8cm 3cm 24cm2 9cm 4cm 36cm2 6cm 6cm 36cm2 20cm 8cm 160cm2
- 27. 1 cm Area = 1cm x 1cm 1 cm = 1cm2 1 m Area = 1m x 1m 1 m = 1m2 Large surfaces are measured in m2
- 28. Old Trafford Stadium has a length of 150 metres and a width of 50 metres. What is the area of this football ground? 150m 50m 50m 150m
- 29. A field is 17m long and 15m wide. What is the area of the field? 17m 15m 15m 17m
- 30. 6 cm 10 cm The diagonal divides the rectangle into 2 equal triangles. Area of = ½ (area of rectangle)
- 31. 6 cm 10 cm Area of rectangle = 60 cm2 Area of each triangle = 30 cm2 Area of = ½ (length x breadth)
- 32. 4 cm 8 cm 10 cm A 7 cm B 5 cm C 6 cm 28 cm2 40 cm2 30 cm2
- 33. A 5 cm 12 cm 6 cm B 10 cm
- 34. 5 cm A 4 cm Area of rectangle A = 5cm x 4cm = 20 cm2
- 35. 10 cm B 7 cm Area of rectangle B = 10cm x 7cm = 70 cm2
- 36. rectangle A = 20cm2 + rectangle B = 70cm2 A 5 cm area = 90cm2 12 cm 6 cm B 10 cm
- 37. 5 cm 28 cm2 11 cm 31 cm2 8 cm 55 cm2 2 cm
- 38. 22 cm 14 cm 16 cm 8 cm B A
- 39. A Area of rectangle A = 22cm x 16cm = 352cm2
- 40. 8 cm B Area of rectangle B = 14cm x 8cm = 112cm2
- 41. 22 cm 14 cm 16 cm 8 cm B A Area of rectangle A = 352cm2 - Area of rectangle B = 112cm2 Area of border = 240cm2
- 42. A rectangular pond, 6m long and 4m wide, has a path 1.5m wide all around it. Find the area of this path. 9m 6 m 1.5 m 4 m Pond 7m 1.5 m
- 43. 9m Pond 7m Area of rectangle = 9m x 7m = 63m2
- 44. 6m 4m Pond Area of pond = 6m x 4m = 24m2
- 45. 9m 6 m 4 m 1.5 m Pond 7m 1.5 m Area of rectangle = 63m2 - Area of pond = 24m2 Area of path = 39m2