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  5. Congruence of Triangles
  6. Criteria for Congruence of Triangles

Grade 9 Sri Lanka School Math Criteria for Congruence of Triangles

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Grade 9
1. Number System
2. Polynomials
3. Geometry
3.1. Introduction to Euclid's Geometry
3.2. Angles and Lines
3.3. Triangles
3.3.1. Classification of Triangles on the Basis of its Sides and Angles
3.3.2. Theorems and Problems Related to Side and Angle Measures of Triangles
3.3.3. Congruence of Triangles
3.3.3.1. Congruence: Understand the Meaning
3.3.3.2. Criteria for Congruence of Triangles
3.3.3.3. Problems Related to Congruence of Triangles
3.3.4. Inequalities in a Triangle
3.4. Quadrilaterals and Parallelograms
3.5. Circles
4. Coordinate Geometry
5. Linear Equations in Two Variables
6. Mensuration
7. Statistics and Probability
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