Question

What is the method to know maths easily chapter lines and angles, triangleand herons formula of class 9th

Answer 1

I think watching videos in byju's or extramarks will help.

As these are advanced, you can view the videos for class 10 or 11 for better performance.

Answer 2

I suggest you to choose a topic from the chapter for a day and try to solve the problems of it .try different sets of problems each day and you can easily learn the chapter