Elements of geometry, containing books I and II with exercises and notes (1882)
Smith, J. Hamblin (James Hamblin), 1829-1901 · Toronto : Gage · leaf 120
Apply the A DEF to the A ABCso that DE coincides with AB.Then •.• z EDF is less than z BAC,DF will tall between BA and .46,and F will fall o/i, or above, or te/ow, ^C.I. If F fall on BC,5^ is less than 5C;.-. ^i^ is less than BC. II. If F fall a5ore 5C, J5i^, FA together are less than BC,… … Then BO, OF together are greater than BF, I. 20. and OC. AO AC; I. 20. .\BC,AF BF,^C together, and AF=AC,.\ BC IS greater than BF •and .. EF is less than BC. q. e. d. ^M 114 EUCLIDS ELEMENTS. [Books I. & IL Note 16. EudaVs Proof of I. 26. If two triangles have two angles of the one equal to two…
Geometry
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