Most trigonometry students look at triangles on ... angles of triangles on a sphere. They used special globes and instruments to make measurements and teach. The Smithsonian collections are ...

The arrangement of the text seems to be well done, the student being led first to understand the geometrical relations between circles of a sphere, their spherical triangles, and after that the ...

Since its opening late last month, it’s become the world’s largest spherical ... thrust of the Sphere’s 4D effects, such as wind. A sphere is truly a love affair with triangles.

Most trigonometry students look at triangles on ... angles of triangles on a sphere. They used special globes and instruments to make measurements and teach. The Smithsonian collections are ...