The Area Of A Circle is equal to 3.14*r. The length of an arc of a sector of a circle with radius r and angle measured in degrees is equal to theta/360 *2*pie*r. The area of a circle segment is the area of the corresponding sector minus the area of the associated triangle. Visit the page NCERT Solutions Class 10 Maths Chapter 12 Exercise 12.3 on the official website of Vedantu or download the Vedantu app for more problems and explanations regarding the same at free of cost.