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 336
plane EBDX, .: EX i^W to BD. XL 16. And .• the jl planes GH, KL, are cut by the plane AXFC, .-. Ai^isllto^a XL 16. Now ••• EX is 11 to BD, a side of a ABD, .•.AE\^ioEB2i^AXi%ioXD, YL 2. and •.• XF is II to ^C, a side of a ADC, .-. JX is to XD as CF is to FD. VL 2. Hence AE is to EB as CF is to FD.… … Let the st. line AB be x to the plane CK. Then must every plane passing through AB he A. tothe plane CK. Let any plane DE pass through AB, and let CE be thecommon section of the planes DE CK.Take any pt. F in CE. In the plane DE draw FG i. to CE. I. 1 ]. Then •.• AB is±to the plane CK. .-. AB is j_…
Geometry · Geometry, Plane
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