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 329
lane IJEF. Then must l ABC = i DEF. ISIake BA=ED, and BC=-EF, I. 3. and join AD, BE, CF, AC, DF.Then y AB is = and |1 to DE, .: ADis = and || to BE. I. 33. So aliio, CF is = and || to BE. .: AD is = and || to CF, Ax. 1 and XI. 9. and .-. .40 is = and l! to DF. I. 33. Then in as ABC, DEF :• AB = DE,… … Let A be the given pt. without the plane BH. It is reqxdred to dravjfrom A a st. line± to the plane BH. In the plane, draw any st. line BC^ and from A draw AD ± to BC. I. 12. Then if J D be ± to the plane, what was required is done.If not, from D draw, in the plane BH, DF± to BC. I. 11.and from A…
Geometry · Geometry, Plane
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