Apollonius was known as the Great Geometer. He was born in Perga in Southern Italy in about 262 bc



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Apollonius was known as the Great Geometer. He was born in Perga in Southern Italy in about 262 BC.

  • Apollonius was known as the Great Geometer. He was born in Perga in Southern Italy in about 262 BC.

  • He was probably educated at the Museum at Alexandria. He taught there for some time then he moved to the scientific centre of Pergamum.

  • It is not known much about his life and most of his writings are lost. Later references can give an idea of contents of his works.

  • Apollonius discussed the locus of (the path traced out by) a point P in his Plane Loci. If , for example , A and B are fixed points and the ratio of PA to PB is constant , locus of P turns out to be a circclei This circle is known as circle of Apollonius



Apollonius was a distinguished astronomer, too. He used circles for his model of the Solar System .

  • Apollonius was a distinguished astronomer, too. He used circles for his model of the Solar System .

  • His model was refined by the two greatest astronomers of later Hellenistic age ; Hipparchus and Ptolemy.



Conics Of Apollonius

  • Conics Of Apollonius

  • Some of works of Apollonius have survived only in Arabic translations . His most known work is the Conics. This big treatise is in eight books. The first four books have come down from Greek manuscrits , the next three in Arabic translations. The eighth book is lost.

  • While the curves known as conic sections were known to the fourth century mathematicians , Apollonius was the first to realize that the three typesparabola , ellipse and hyperbola. These curves could be generated by taking sections of a single circular cone by varying the inclination of the cutting plane . By introducing the ‘ double napped’ cone , he was able to generate the two branches of the hyperbola.








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