In this chapter, students will define the perimeter (circumference) and area of a circle and learn the standard formulae used to calculate them. The chapter explains the use of radius and diameter in finding the circumference and area of a circle, forming the basis for solving practical geometry problems.

Students will also learn to find the areas of sectors and segments of a circle and apply these concepts to calculate the areas of combinations of plane figures. Through real-life examples and numerical problems, this chapter enhances problem-solving skills and is highly important for CBSE Board examinations and competency-based questions.