Keywords: Spherical triangle with central angle.svg A spherical triangle showing how the length of the arc is calculated using the angle at the centre RechtwKugeldreieck svg 50 2012-01-24 21 21 UTC RechtwKugeldreieck svg Traced by User Stannered from a PNG by en User Rt66lt derivative work <b><font color 1b37e5 >Nik</font><font color 328824 >Naks</font></b> <sub>talk - gallery - wikipedia</sub> PD-user-w Original upload log This image is a derivative work of the following images File RechtwKugeldreieck svg licensed with PD-user-w 2007-04-24T18 21 41Z Stannered 356x358 9767 Bytes <nowiki> a right-angled spherical triangle en Image RechtwKugeldreieck png 2007-04-24 Traced by User Stannered from a PNG by en User Rt66lt PD original other</nowiki> Uploaded with derivativeFX Spherical geometry Spheres Spherical triangles |