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 318
a solid figure, contained by twentyequal and equilateral triangles. XXX. A Parallelepiped is a solid figure, contained by sixquadiilateral figures, of which every opposite two are parallel Postulate.Let it be granted that a plane may be made to pass throughany given straight line. Book XL]… … Let the two st. lines AC, BG meet in C. Then a plane can he draivn to contain AC and BC.Let any plane EF be drawn to contain AC, Post. and let EF be turned about AC till it pass through B.Then .• B and C are points in the plane EF, .. BC lies in the plane EF. XI. Def. 1. Also, any plane containing…
Geometry · Geometry, Plane
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