Math iv finding the area of an irregular figures
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To find the area of an irregular figure, one must first divide it into recognizable regular shapes like rectangles and squares. Then, the area of each individual shape should be calculated and added together to find the total area. The key steps are: 1) dividing the irregular shape into regular ones, 2) finding the area of each part, and 3) adding all areas together.
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Math iv finding the area of an irregular figures
- 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:
- 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.