A free app for Android, by Michael Sekora.
Triangle Calculator is a tool for calculating the angles, edges, and sides of any triangle. It provides a 2-solution for triangles that are either too easy or too difficult to solve by hand.
The app uses the trigonometric functions of Heron's formula, The Law of Cosines and Sines, and the Pythagorean Theorem. It also provides the option to set one of the angles as a free variable, thus allowing you to solve the equation for any value of that angle.
If you know the values of two angles, two edges, and one side, it will give you the value of the third. It also provides various options for calculating each of those values in different ways.
It is a very easy-to-use application that does not require any advanced knowledge of mathematics or trigonometry.
