Elements of geometry : containing books I to VI and portions of books XI and XII of Euclid, with exercises and notes (1881)
Smith, J. Hamblin (James Hamblin), 1829-1901, Kirkland, Thomas, 1835-1898 · Toronto : W.J. Gage · leaf 321
be but one plane common to the point P andthe St. line MX. XI. 1, Cor. 2. . *. P is not common to both planes. Hence every point in the common section of the planes liesin the straight line MX. Q. E. b. JSote.—The Propositions which fullow are numbered as inEuclid. 3H EUCLIDS ELEMENTS. [Book XI.… … Let the St. line EF be ± to each of the st. lines AB, CD,at E, the pt. of their intersection. Tlien must EF he± to the plane passing through AB, CD. Make AE, EB, CE, ED, all equal to one another,and through E, draw, in the plane in which AB, CD are,any st. line GEH, and join AD, CB. Take any pt. F,…
Geometry · Geometry, Plane
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