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 41
an arc drawn from O as a centre, with the radiusOB. 52. A Chord is a straight line joiningany two points in a circumference, but notpassing through the centre, as BC or ad.Fig. 28. The portion of the circle includedbetween the chord and its arc, as kmD, is aSegment. 53, A Tangent to a circle is a… … Ex. 1. Suppose DC, Fig. 11, to represent a small wooden rod, andBA a wire stuck into it at right angles. Now if you take the end Cof the rod in your fingers and place the end D on the table so thatthe rod shall stand upright, and then revolve the rod once aroundlike a shaft, what will the wire…
Geometry · Trigonometry
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