Sphere Geometry Diagram - Great Circles, Meridians, and Key Points #267610 (License: Personal Use)

This black-and-white line drawing depicts a sphere with labeled points P (north pole), C and D (equatorial points), and intersecting great circles including the prime meridian (C-P-D) and another meridian (A-P-E). Dashed lines indicate hidden curves, while solid lines show visible arcs; point H lies on the equatorial plane, and B is on the lower hemisphere. The diagram serves as a foundational illustration in spherical trigonometry and navigation theory.

Used in educational resources, mathematics textbooks, and online courses covering spherical geometry, astronomy, or cartography; targets students and educators seeking visual reinforcement of 3D spatial relationships on a sphere.