Menelaus of Alexandria


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Menelaus of Alexandria

 

ancient Greek astronomer and mathematician (first century). Menelaus was the author of works on spherical trigonometry: six books on calculations of chords and the Sphaerica, extant in an Arabic translation, in three books. Menelaus separated trigonometry from geometry and astronomy. Arabic authors also mention a book by Menelaus on hydrostatics.

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Menelaus of Alexandria was a Greek mathematician and astronomer, the first to recognize geodesics on a curved surface as natural analogs of straight lines.
Of particular interest are a fragment of an astronomical treatise on planetary theory, probably by Menelaus of Alexandria, and a piece from a canon of lunar eclipses.