“Areas Related to Circles” covers the concepts of the perimeter (circumference) and area of a circle and applies this knowledge in finding the areas of two particular ‘parts’ of a circular region known as sector and segment. This chapter begins with the concepts of perimeter and area of a circle. Using this concept, the chapter further explains how to find the area of sector and segment of a circular region. Areas Related to Circles is a part of Mensuration, and this Unit holds a total weightage of 10 marks in the final exam. In the final examination, one question is sometimes asked from this chapter.