CG board class 9 mathematics I गणित I chapter 10 I Exercise 10.2 I Solution I Congruency of triangle I Introduction I Concept I Complete solution I Chhattisgarh I Concept I Complete solution I Chhattisgarh I Part 6 I Chhattisgarh state board scert Raipur कक्षा 9 गणित I CG I Chhattisgarh I Board I CGBSE I Solution video I Video I I Practice I Complete solution I maths solution I Mathematics I CG Board I @chhattisgarhschoolishere1949