Educational software reinforces the learning process in high school. This way, GEO-line software for learning geometry will strengthen teenagers' skillset between 15 and 16 years old while using this new application. The SCRUM and ADDE methodologies applied include the analysis, design, implementation, and evaluation phases as the core principles for software development. The technological toolset selected was the NEXTJS framework with server-side rendering technology. Strapi API CMS handled the content used on the model, view, controller (MVC) patterns, and REST architecture for communication and the PostgreSQL database. ISO/IEC 25010 metric was considered for the usability evaluation and applied with a pool of 80 students who were surveyed using the adapted USE and PSSUQ QUESTIONNAIRES with a Likert scale. The findings demonstrate that GEO-line software meets the satisfactory higher standards usability level by measuring pedagogical capacity, ease-of-use, and ease-of-learning parameters. This research turns the geometry learning reinforcement tool for students into a fun and operational way to increase the student's skillset. [For the complete proceedings, see ED655360.]