9M07 - Triangles - Criteria for congruency

4,233 views · Published 21 July 2016 · 2:46 · Indexed 30 September 2026

Channel: Avanti Gurukul · 2016 · Education

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Class 9 Maths – Triangles
We all have studied triangles in our earlier classes. We know what a triangle is, a closed figure with 3 sides, vertices and angles. We know triangle is made by intersecting 3 lines at particular angles to each other. We have studied this in last chapter. In this chapter, we will unfold some new properties of triangles. We’ll learn
1. Basics of triangles and its different types.
2. What is congruency?
3. Criteria of congruency.
4. What are different congruency criteria?
5. What are isosceles triangle and what are its unique properties?
6. Inequalities in a triangle.

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