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 66
the other two. III.—The figures in themargin are all quadrilat-erals. A is a trapezium.(Why?) B is a trapezoid.(Why?) C, D, E, and F are /parallelograms. (Why ?)D and E are rectangles,although D is the formusually referred to by theteiTa rectangle. So C isthe form usually referredto when a… … Fig. 79. 100. A Diagonal is a line joining two angles of a figure, notadjacent. III.—In common language, a diagonal is a line running from comer tocorner. Ex. 1. To construct a square,having given a side; or, in otherwords, to construct a square on a given line. *The pupil Phould be able to give…
Geometry · Trigonometry
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