Students will study in detail triangles and their various properties in NCERT solutions for class 9 maths chapter 7 exercise 7.3. The chapter introduces the definition of a triangle, congruence of triangles, inequalities in a triangle, rules of congruence, and more. The chapter explains some rules or criteria for the congruence of triangles. It covers Side- Angle- Side Congruence Rule, Angle- Side- Side Congruence Rule, and Angle- Angle- Side Congruence Rule. Apart from it, other properties of an isosceles triangle, theorems related to triangles, and more concepts are explained in detail in ch 7 Maths NCERT Solutions Class 9 ex 7.3. Students can also avail of NCERT Solutions for Class 9 Science from our website.