1. Copyright Tim Morris/St Stephen's School
Area of a Rectangle
This is one in a series of Powerpoint slideshows to illustrate how to calculate the area of various 2-D shapes.
Start with the Rectangle, then move onto the Parallelogram.
After that select any of Triangle, Trapezium and Circle.
Please feel free to copy and modify any of these slide shows, but make sure you acknowledge the author when doing so.
Copyright Tim Morris/St Stephen's School

2. Copyright Tim Morris/St Stephen's School
RECTANGLE
What is the area
of this rectangle?
W=width
Copyright Tim Morris/St Stephen's School

3. DIVIDE IT UP INTO SQUARES!
RECTANGLE
What is the area
of this rectangle?
H=height
W=width
DIVIDE IT UP INTO SQUARES!
Copyright Tim Morris/St Stephen's School

4. CHOOSE STANDARD SIZE SQUARE!
RECTANGLE
What is the area
of this rectangle?
H=height
W=width
CHOOSE STANDARD SIZE SQUARE!
Copyright Tim Morris/St Stephen's School

5. CHOOSE STANDARD SIZE SQUARE!
RECTANGLE
What is the area
of this rectangle? 7 14 21 28 35 42 49 56 63 6 13 20 27 34 41 48 55 62 5 12 19 26 33 40 47 54 61
H=height 4 11 18 25 32 39 46 52 60 3 10 17 24 31 38 45 52 59 2 9 16 23 30 37 44 51 58 1 8 15 22 29 36 43 50 57
W=width
CHOOSE STANDARD SIZE SQUARE!
Copyright Tim Morris/St Stephen's School

6. Copyright Tim Morris/St Stephen's School
RECTANGLE
What is the area
of this rectangle? 7 14 21 28 35 42 49 56 63 6 13 20 27 34 41 48 55 62 5 12 19 26 33 40 47 54 61
H=height 4 11 18 25 32 39 46 52 60 3 10 17 24 31 38 45 52 59 2 9 16 23 30 37 44 51 58 1 8 15 22 29 36 43 50 57
W=width
COUNT THE SQUARES…63
Copyright Tim Morris/St Stephen's School

7. AREA = 63 STANDARD SQUARES
RECTANGLE
What is the area
of this rectangle? 7 14 21 28 35 42 49 56 63 6 13 20 27 34 41 48 55 62 5 12 19 26 33 40 47 54 61
H=height 4 11 18 25 32 39 46 52 60 3 10 17 24 31 38 45 52 59 2 9 16 23 30 37 44 51 58 1 8 15 22 29 36 43 50 57
W=width
AREA = 63 STANDARD SQUARES
Copyright Tim Morris/St Stephen's School

8. BUT THERE IS ANOTHER WAY!
RECTANGLE 7
What is the area
of this rectangle? 6 5
H=height 4 3 2 1
W=width
BUT THERE IS ANOTHER WAY!
Copyright Tim Morris/St Stephen's School

9. Copyright Tim Morris/St Stephen's School
RECTANGLE 7
What is the area
of this rectangle? 6 5
H=height 4 3 2 1
W=width
COUNT THE ROWS…7
Copyright Tim Morris/St Stephen's School

10. Copyright Tim Morris/St Stephen's School
RECTANGLE
What is the area
of this rectangle? 7 6 5
H=height 4 3 2 1 2 3 4 5 6 7 8 9
W=width
COUNT THE COLUMNS…9
Copyright Tim Morris/St Stephen's School

11. THERE ARE 7 ROWS OF 9 COLUMNS
RECTANGLE
What is the area
of this rectangle? 7 6 5
H=height 4 3 2 1 2 3 4 5 6 7 8 9
W=width
THERE ARE 7 ROWS OF 9 COLUMNS
Copyright Tim Morris/St Stephen's School

12. THERE ARE 7 x 9 = 63 STANDARD SQUARES
RECTANGLE
What is the area
of this rectangle? 7 6 5
H=height 4 3 2 1 2 3 4 5 6 7 8 9
W=width
THERE ARE 7 x 9 = 63 STANDARD SQUARES
Copyright Tim Morris/St Stephen's School

13. Copyright Tim Morris/St Stephen's School
RECTANGLE 7
What is the area
of this rectangle? 6
Arearectangle
= Rows x Columns
= Width x Height 5
H=height 4 3 2 1 2 3 4 5 6 7 8 9
W=width
Copyright Tim Morris/St Stephen's School

14. Arearectangle = Width x Height
(perpendicular height H)
H=height
W=width
Copyright Tim Morris/St Stephen's School