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 104
it will be per-pendicular to the other {144). Draw the radiiOB and OD. Revolve the portion of the figureon the right of EF, upon EF until it falls on theplane on the left of EF. Then, since RS andLM are perpendicular to EF, IS will fall in IR,and HM in HL. Moreover, as there cannot betwo equal… … (V PROPOSITION XI. 17S, Theorein*—If a secant le parallel to a tangent^ tlie arcsintercepted hetioeen the intersections and the point of tangency areequal, Dem.—Let the secant LM be parallel to p the tangent RS ; then is CP - EP. For, draw the radius OP to the point oftangency; it will be…
Geometry · Trigonometry
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