Area of rectangles and triangles

6,909 views
6,157 views

Published on

Published in: Education, Technology
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
6,909
On SlideShare
0
From Embeds
0
Number of Embeds
38
Actions
Shares
0
Downloads
142
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide
  • Give each student a rectangle with measurements on the side. Get them to fold along the diagonal and discuss how we made a rectangle into a triangle. Discuss how this works and see if we can come up with a rule. Write it on the white boards. Then see if we can write it as a algebraic formula.
  • Area of rectangles and triangles

    1. 1. Entry Activity Look at the cards on your desk. In pairs discuss match thekey words to the definitions.
    2. 2. The space inside the shapeArea Remember: The grass inside a field The length around the outside of a shapePerimeter Remember: The fence around the field A four sided shape, two sets of parallel sides, two pairs ofRectangle sides that are the same length, all angles are 90˚ A four sided shape, all sides are the same length,Square all angles are 90˚, two pairs of parallel sides A shape with three sides, all the sides are straightTriangle This shows a measurement of areacm² A shape with only straight sidesPolygon Side by side and having the same distanceParallel continuously between them
    3. 3. • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
    4. 4. I will learn to calculate the area of squaresand rectangles by counting squares Level 3
    5. 5. I will learn to calculate the area of squaresand rectangles by counting squares Level 3
    6. 6. • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
    7. 7. I will learn to calculate the area of squares and rectangles using lengths Level 4 9 cm
    8. 8. I will learn to calculate the area of squares and rectangles using lengths Level 4 108cm² 9cm² 25cm² 24cm² 35cm² 9 cm 84cm² 49cm² 54cm² 81cm² 121cm² 147cm² 20cm² 22.75cm² 45cm² 0.25cm²
    9. 9. • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
    10. 10. I will learn to calculate the area of a triangle Level 5
    11. 11. I will learn to calculate the area of a triangle Level 5
    12. 12. I will learn to calculate the area of a triangle Level 5
    13. 13. • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
    14. 14. Challenge Objective: I will learn to calculate the area of compound shapes Level 5+ 10cm 2cm Rectangle A 4cm Rectangle B 3cm
    15. 15. Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
    16. 16. Challenge Objective: I will learn to calculate the area of compound shapes Level 5+ 76cm² 19cm² 16cm² 36cm² 88cm² 48cm²
    17. 17. Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
    18. 18. Challenge Objective: I will learn to calculate the area of compound shapes Level 5+ 64cm² 64cm² 35cm² 136cm²
    19. 19. Progress SheetI can calculate the area of squares and rectangles by counting squares Level 3I can calculate the area of squares and rectangles using lengths Level 4I can calculate the area of a triangle Level 5I can calculate the area of compound shapes Level 5+
    20. 20. Red QuestionCalculate the area of the shape below
    21. 21. Pink QuestionCalculate the area of the shape below
    22. 22. Salmon QuestionCalculate the area of the shape below
    23. 23. Purple QuestionCalculate the area of the shape below
    24. 24. Yellow QuestionCalculate the area of the shape below
    25. 25. Gold QuestionCalculate the area of the shape below
    26. 26. Mint QuestionCalculate the area of the shape below
    27. 27. Blue QuestionCalculate the area of the shape below
    28. 28. Green QuestionCalculate the area of the shape below
    29. 29. Answer of 16cm²Area of compound shapes
    30. 30. Answer of 76cm²Area of compound shapes
    31. 31. Answer of 19cm²Area of compound shapes
    32. 32. Answer of 48cm²Area of compound shapes
    33. 33. Answer of 36cm²Area of compound shapes
    34. 34. Answer of 88cm²Area of compound shapes
    35. 35. Answer of 64cm²Area of compound shapes
    36. 36. Answer of 35cm²Area of compound shapes
    37. 37. Answer of 136cm²Area of compound shapes

    ×