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  3. Geometry
  4. Polygon
  5. Understanding Polygons
Grade 7
1. Integers
2. Prime Numbers
3. Square Roots and Cube Roots
4. HCF and LCM
5. Fractions
6. Rational Numbers
7. Decimals
8. Estimation
9. Number Pattern
10. Ratio and Proportion
11. Unitary Method
12. Percentage
13. Profit and Loss
14. Simple Interest
15. Exponents
16. Algebraic Expressions
17. Linear Equations in One Variable
18. Mensuration
19. Volume and Surface Area
20. Geometry
20.1. Lines and Angles
20.2. Triangles
20.3. Polygon
20.3.1. Understanding Polygons
20.3.2. Diagonals in a Polygon with n Sides
20.4. Quadrilaterals
20.5. Congruence
21. Practical Geometry
22. Reflection and Rotational Symmetry
23. Three-Dimensional Shapes
24. Probability
25. Data Handling

Grade 7 Sri Lanka School Math Understanding Polygons

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