- equiangular hyperbola.
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equiangular hyperbola. — See rectangular hyperbola … Useful english dictionary
rectangular hyperbola — Geom. a hyperbola with transverse and conjugate axes equal to each other. Also called equiangular hyperbola, equilateral hyperbola. [1880 85] * * * … Universalium
Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… … Wikipedia
Pappus of Alexandria — (Greek polytonic|Πάππος ὁ Ἀλεξανδρεύς) (c. 290 ndash; c. 350) was one of the last great Greek mathematicians of antiquity, known for his Synagoge or Collection (c. 340), and for Pappus s Theorem in projective geometry. Nothing is known of his… … Wikipedia