The GeoGebra applet above provides an environment for exploring Spherical Geometry. Open it in the App. You will likely get an error message. Just click OK and proceed. Use the checkboxes to hide/show the equator and poles, and a latitude/longitude coordinate grid as desired. Clicking in the in the window with the unit sphere (Spherical plane), you will have access to a few menus of custom tools. These tools provide Spherical Geometry versions of the tools that are built into GeoGebra for exploring Euclidean Geometry. You can use this environment to create Spherical Geometry figures, much in the same way that you can use the built-in tools to make Euclidean Geometry figures. We have created three slider/input box controls for the parameters a, b, and c, which can be used in further constructions if needed.