Geometer is a very simple free application that will offer us the chance to be able to calculate the surface, as well as the angles, of any geometric shape by inputting certain data. As well as all the latter, it will be able to solve volume problems for all kinds of shapes.
The program has a very simple interface from which we will be able to choose all kinds of problems to be able to solve and from which we will have access to various utilities, like the Windows calculator or an angle converter.
Furthermore, the application will allow you to show the numbers in decimal form or as degrees-minutes-seconds.
If you're looking for a tool that will help you with all kinds of geometric calculations, try out Geometer, a simple and totally free tool.