網頁2023年1月13日 · Ptolemy, Latin in full Claudius Ptolemaeus, (born c. 100 ce —died c. 170 ce ), an Egyptian astronomer, mathematician, and geographer of Greek descent who flourished in Alexandria during the 2nd century ce. In several fields his writings represent the culminating achievement of Greco-Roman science, particularly his geocentric (Earth …

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網頁克罗狄斯·托勒密（Claudius Ptolemaeus,）“地心说”的集大成者，约公元90年出生于埃及的托勒马达伊，曾在亚历山大城居住和工作，168年去世。 父母都是希腊人。公元127年， 年轻的托勒密被送到亚历山大去求学。在那里，他阅读了不少的书籍，并且学会了天文测量和大地测 …

網頁Ptolemy I Soter (/ˈtɒləmi/; Greek: Πτολεμαῖος Σωτήρ, Ptolemaîos Sōtḗr "Ptolemy the Savior"; c. 367 BC – January 282 BC) was a Macedonian Greek[1] general, historian and companion of Alexander the Great from the Kingdom of Macedon in northern Greece who became ruler of Egypt, part of Alexander's former empire. Ptolemy ...

網頁托勒密(Ptolemy)定理指出，圆的内接凸四边形两对对边乘积的和等于两条对角线的乘积。 原文：圆的内接四边形中，两对角线所包矩形的面积等于 一组对边所包矩形的面积与另一组对边所包矩形的面积之和。 从这个定理可以推出正弦、余弦的和差公式及一系列的三角恒等式，托勒密定理实质上是关于 ...

網頁2012年2月3日 · Ptolemy I Soter. Marie-Lan Nguyen (Public Domain) Ptolemy I Soter (366-282 BCE) was one of the successor kings to the empire of Alexander the Great. He served not only as king of Egypt but also the founder of the Ptolemaic Dynasty, a dynasty which included the infamous Cleopatra VII.

網頁Ptolemy , Latin Claudius Ptolemaeus, (born c. ad 100—died c. ad 170), Greek astronomer and mathematician. He worked principally in Alexandria. It is often difficult to determine which findings in his great astronomical book, the Almagest, are Ptolemy’s and which are Hipparchus ’s. The Sun, Moon, planets, and stars, he believed, were ...