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  3. Mensuration
  4. Area of Polygon
  5. Area of Regular Polygons
Grade 8
1. Rational Numbers
2. Square and Square Roots
3. Cube and Cube Roots
4. Exponents
5. Direct and Inverse Proportions
6. Time and Work
7. Percentage
8. Profit and Loss
9. Compound Interest
10. Algebraic Expressions
11. Linear Equations in One Variable
12. Factorization
13. Playing with Numbers
14. Geometry
15. Graphs
16. Mensuration
16.1. Area of a Trapezium
16.2. Area of Polygon
16.2.1. Area of Irregular Polygons
16.2.2. Area of Regular Polygons
17. Volume and Surface Area
18. Three-Dimensional Figures
19. Probability
20. Data Handling

Grade 8 Sri Lanka School Math Area of Regular Polygons

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