The ability to study whenever and wherever one pleases is only one of the many reasons why online education is gaining popularity in the academic world. When used by qualified instructors, e-learning tools can revolutionise the educational landscape. The FLIP classroom is the most modern instructional approach, and it is gradually gaining traction in India. In this research, we present a tutor (e-learning package) that uses the Flip model to educate students on how to approach and solve problems in the mathematical subfield of mensuration. Students can use this instructor to better grasp the Mensuration principles given in school. There are five main components that make up the tutor's layout: (i) the lessons themselves, (ii) the problem classification system, (iii) the student module, (iv) the teacher module, and (v) the reports.