At the age of twenty-seven, Ibrahim ibn Sinan, was the only known mathematician in the year 935 BC.  He was born in the city of Baghdad in 908 BC, where he also died at the age of thirty-eight. Ibrahim ibn Sinan’s interests were in geometry, especially tangents to circles, astronomy, and mathematical philosophy.  He also wrote several books on geometry, including On Drawing the Three Conic Sections, which explains the constructions of the ellipse, hyperbola, and parabola.  By studying the geometry of the shadows of the sun, Sinan tried to describe what he thought was the motion of the sun.  The most famous work of Ibrahim ibn Sinan was the quadrature of the parabola.  From this problem, Sinan developed a method of integration that was more general than the previously defined technique by Archimedes.  His book, On the Measurement of the Parabola, introduces a theorem that states that the area of a segment of a parabola is four-thirds times the area of the triangle inscribed in that parabola. Ibrahim ibn Sinan translated many Greek mathematical and philosophical works.  Because of his work in mathematical philosophy, he has been labeled the "foremost Arab mathematician to treat mathematical philosophy."

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References:
 Ibrahim, ibn Sinan ibn Thabit ibn Qurra
 http://www.cwi.nl/~keesh/Iran/Maths/qurra.htm

Mac Tutor History of Mathematics Archive
 http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Ibrahim.html