Hermione (mythology) Hermione (mythology) In Greek mythology, Hermione (; ) was the only child of Menelaus, king of Sparta, and his wife, Helen of Troy. Prior to the Trojan War, Hermione had been betrothed by Tyndareus, her grandfather, to Orestes, son of her father's brother, Agamemnon; she was just nine years old when Paris, son of the Trojan king Priam, arrived to abduct her mother, Helen. During the war, Menelaus promised her to Achilles' son, Neoptolemus. and after the war ended, he sent Hermione away to the city of Phthia (the home of Peleus and Achilles), where Neoptolemus was staying. The two
Menelaus of Alexandria great circle arcs, which he named "trilaterals") and proves Menelaus' theorem on collinearity of points on the edges of a triangle (which may have been previously known) and its analog for spherical triangles. It was later translated by the sixteenth century astronomer and mathematician Francesco Maurolico. The lunar crater Menelaus is named after him. The titles of a few books by Menelaus have been preserved: Menelaus of Alexandria Menelaus of Alexandria (; , "Menelaos ho Alexandreus"; c. 70 – 140 CE) was a Greek mathematician and astronomer, the first to recognize geodesics on a curved surface as natural analogs of