1. What is area? The amount of space that a figure encloses
The number of square units that covers a shape or figure.
It is two-dimensional
It is always answered in square units

2. Area of a square
S is the side
Area= side x side
A= s x s

3. Find the area of a square using the formula
To find the area of a square, multiply the side x side
Area = side x side
Area = 3 m x 3 m
The area is 9 m2
3 m
3 m

4. Area of a rectangle b is the base h is the height Area= base x height
A= b x h
You may also see this as A = l x w (Area = length x width)

5. Find the area of the rectangle using the formula
To find the area of a rectangle, multiply the length x width.
Area= length x width
The length= 6 m
The width=2 m
Area=6 x 2
The area is 12 m2
6 m
2 m

6. Area of a triangle B is the base H is the height
Area= ½ x base x height
A= ½ x b x h

7. Find the area of the triangle using the formula
Area = 1/2 x base x height
A= 1/2 x b x h
A= 1/2 x 8 x 5m
A= 1/2 x 40 square meters
A= 20 square meters
The area is 20 m2
5 m
8 m

8. Area of a parallelogram
Do Re Mi
b is the base
h is the height
Area= base x height
A= b x h

9. Find the area of parallelogram using the formula
Area = base x height
A= b x h
A= 4 x 3
A= 12 square units
The area is 12 units2

10. What is the area of this figure?
It is a square
Formula for the area of a square is side x side
Side= 17 m
Area= 17 x 17
A= 289 m2
17 m.
17 m

11. What is the area of this figure?
It is a triangle
Formula for the area of a triangle is
A = ½ x base x height
4 cm
13 cm
Base= 13 cm
Side= 4 cm
Area= ½ x 13 x 4
A= 26 cm2

12. What is the area of this figure?
It is a parallelogram
Formula for the area of a parallelogram is
A = base x height
Base= 3 units
Height= 6 units
Area= 6 x 3
A= 18 units2

13. What is the area of this figure?
It is a rectangle
Formula for the area of a rectangle is length x width
Length= 8m
Width= 3 m
Area= 8 x 3
A=24 m2
8 m
3 m

14. What is the area of this figure?
It is a square
Formula for the area of a square is side x side
Side= 12 cm
Area= 12 x 12
A= 144cm2
12 cm
12 cm

15. What is the area of this figure?
It is a triangle
Formula for the area of a triangle is ½ x base x height
Base= 8 m
Side= 5 m
Area= ½ x 8m x 5 m
A=20 m2
5 m
8 m

16. What is the area of this figure?
It is a parallelogram
Formula for the area of a parallelogram is
A = base x height
Base= 5 units
Height= 5 units
Area= 5 x 5
A= 25 units2

17. What is the area of this figure?
It is a rectangle
Formula for the area of a rectangle is
A = length x width
Length= 13 cm
Width= 4 cm
Area= 13 x 4
A= 52 cm2
13 cm
4 cm

18. What is the area of this figure?
7 cm
It is a rectangle
Formula for the area of a rectangle is
A = length x width
Length= 16 cm
Width= 7 cm
16 cm
Area= 16 x 7
A= 112 cm2

19. Do you remember the formula for the area of a circle?
For a circle, the area is:
A = Πr2
= Π x 52
=78.54 cm2

20. What about unusual / composite shapes?
This shape can be divided into two rectangles. Find their areas and add them together.
Area 2= l x b
= 4 x 6
= 24 cm2
Area 1= l x b
= 8 x 20
= 160 cm2
Total area = A1 + A2 =
=184 cm2

21. In this case, a measurement needs to be found before you begin.
Try another one:
In this case, a measurement needs to be found before you begin.
7 m
A2 = 15 x 7
=105 cm2
A1 = 5 x 8
=40cm2
Total area = A1 + A2 =
= 145 cm2

22. What did you learn? What is area?
How are the units of area usually expressed?
How many dimensions is area?
What does the “S” mean in the formula for the area of a square?
What is the formula for the area of a square?
What is the formula for the area of a rectangle?
What does the “h” stand for in the formula for the area of a triangle?

23. More… What is the formula for the area of a parallelogram?
What does the “b” stand for in the formula for the area of a triangle?
What does the “h” stand for in the formula for the area of a rectangle?
What is the formula for the area of a rectangle?
What are the four formulas we have learned today?

24. Closure: Remember Formulas!
Square: A = s x s
Rectangle : A = b x h
Triangle: A = ½ x b x h
Parallelogram: A= b x h
Circle: A = π x r2

25. http://www. ideal-resources. com