History
Spherical trigonometry was studied by early Greek mathematicians such as Menelaus of Alexandria, who wrote a book on spherical trigonometry called Sphaerica and developed Menelaus' theorem.
Read more about this topic: Spherical Geometry
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“There is no example in history of a revolutionary movement involving such gigantic masses being so bloodless.”
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—Robert M. Fresco, and Jack Arnold. Prof. Gerald Deemer (Leo G. Carroll)