class 9 math chapter 6 exercise 6.2 question 1 ncert solution 02.04 class 9 math chapter 6 exercise 6.2 84.92 class 9 math ch 6 ex 6.2 q 1 79.07 lines and angles exercise 6.2 #linesandangle #linesandanglesclass9 #ncert #maths #ncertmaths #class9maths #ncertsolutions