2025-08-31 00:00:00 Trigonometry Master is a simple app that allows you to quickly calculate unknown sides and angles of any triangle. It will also calculate the area and perimeter of the triangle. The app finds the sides, angles, area and perimeter of a triangle based on input parameters. - Right triangle: Enter two values, two sides or a side and an angle, tap Calculate and Trigonometry Master will find remaining values.