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Triangles (9th Grade Mathmatics)

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9th Grade Mathematics At the end of this lesson, you will be able to: • Verify and explain whether two given figures are congruent or not. • State the criteria for congruency of two triangles and apply them in solving problems. • Prove that angles opposite to equal sides of a triangle are equal. • Prove that sides opposite to equal angles of a triangle are equal. • Prove that if two sides of triangle are unequal, then the longer side has the greater angle opposite to it. • State and verify inequalities in a triangle. • Solve problems based on the above results.


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