ppt

2.  To find the area of an
irregular figure, the first
thing to do is to divide the
irregular shape to regular
shapes that you can
recognize such as
rectangle and square.

3.  When you done
dividing, find the
area of these
individual shapes
and add all
answers.

4. 3cm
12 cm

5. 3cm
12 cm
Area of Square
A = s2
A = 3cm x 3cm
A = 9 sq cm
Area of Rectangle
A = l x w
A = 3cm x 12cm
A = 36 sq cm

6. 9 sq cm
36 sq cm
A = 45 sq cm
Add:

7. 2cm 4cm
20cm
4cm
20cm

8. 20cm 2cm
4cm
4cm
20cm

9. 20cm 2cm
Area of Rectangle:
A = l x w
A = 20cm x 2cm
A = 40 sq cm

10. 4cm
20cm
Area of rectangle: A = l x w
A = 4cm x 20cm
A = 80 sq cm

11. 4cm
Area of square:
A = s2
A = 4cm x 4cm
A = 16 sq cm

12. Add:
40 sq cm
80 sq cm
16 sq cm
A = 136 sq cm

13. GENERALIZATION
There are 3 steps in finding the area
of an irregular figure.
1.DIVIDE irregular figure to regular
shapes.
2. FIND THE AREA of each shapes.
3. ADD all the answers.

14. 8cm
5cm
6cm
2cm
3cm
12cm
4cm

15. 8cm
6cm
5cm 4cm
3cm
2cm
12cm