Grade 9 Oman School Math Congruence: Understand the Meaning
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2. Polynomials
3. Geometry
3.2. Angles and Lines
3.3. Triangles
3.3.3. Congruence of Triangles
3.3.3.1. Congruence: Understand the Meaning
3.3.3.2. Criteria for Congruence of Triangles
3.3.4. Inequalities in a Triangle
3.5. Circles
6. Mensuration