Automated Evaluation of Student Answers for Geometric Questions Based on the Theorem 'Angles on a Straight Line Add to 180±’

Evaluation of the answers for a geometry-related question is a much more challenging task due to the usage of multiple methods for solving this kind of problem. However, in this research, an automated system to evaluate the students' answers to geometric questions has been introduced. The image of the problem and the image of the student's answer are the inputs of this system. The system can evaluate student's answers by using the identified angles and creating equations in the system. Furthermore, the system allocates the marks for correct steps and provides feedback on whether the answer is correct or incorrect. Here, the set of rules using “sympy” has been used to create the solved answer by the system. Currently, the system evaluates the answers only for the problems related to the theorem” Angles on a Straight Line Add to 180°”. The system has been tested with 30 student answers for 10 questions. 18 were correct out of these 30 answers.