With the app, different forms such as solving (Triangular, trapezoidal, square, circle, ...)
This requires the app any known values ​​are given,e.g. the side lengths of a triangle. The app will now calculate the remnant values ​​such as area and perimeter as well as the angles of the triangle.

Of course, other combinations of the default values ​​are possible, such as 2 angles and a side ...