A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 340
ircle, such thatthe vertices of the one are thepoles of the sides of the other,the two polygons are calledHecii^rocal Polars; andthe circle is called the AuxiliaryCircle. The possibility of constructing suchpolygons is apparent from the last the-orem. When the points P, P, P, P Fig, 51oare in the… … 1011. By means of the relation between reciprocal polars a largeclass of propositions relating to the relative positions of lines andpoints, become, as it were, double ; i.e., one proposition being proved,another can be inferred. The process by which the inference is madeis called reciprocation. We…
Geometry · Trigonometry
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