This research is a qualitative descriptive study that aims to describe learning the area of trigonometric triangles using the website in Vocational High School. Learning mathematic to use this website begins with making teaching materials in the form of modules, interactive PowerPoints, activity sheets, and formative test questions. All learning materials can be accessed through the website that has been designed. The data collection technique uses screen recordings from Zoom meetings, observations, and interviews. The test instrument is used as supporting data to see student learning outcomes after learning the area of trigonometric triangles as a whole. The results showed that during the learning process, which lasted for two meetings, students could follow well all stages of learning and get good results.