Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 182
icular to the other also. PROP. XIV. THEOR. If tvvo parallel planes be cut by another plane, their com-mon sections with it are parallels. Let the parallel planes AB, CD be cut by the plane EFHG, andlet their common sections withit be EF, GH; EF is paralleltoGH. For the straight lines EPand GH are… … 1«2 SUPPLEMENT TO THE ELEMENTS PROP. XV. THEOR. !lf two parallel planes be cut by a tbird plane, they havethe same inclination to that plane. Let AB and CD be two parallel |ilane?, and EH a third plane cut-tinji them: The planes AB and CD are equally inclined to EH. Let the straight lines EF and GH…
Euclid's Elements · Geometry · Trigonometry
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