Hai Sir, I am working  as  a teacher in a school, eventhough I had some difficulties to explain some concepts in mensuration chapter.This shows that I am not confident enough to handle the chapter that I very well understand.In this chapter I am unable to understand the question what they have ask and i dont know how to proceed the problem and to workout the problem.I am not able to understand the question of the problem.Try to help me to get the way to under stand the problem in an easy way and make to explain the problem to the students in an easy way.Please make to work out the problem in an easy way