Elements of geometry, containing books I and II with exercises and notes (1882)
Smith, J. Hamblin (James Hamblin), 1829-1901 · Toronto : Gage · leaf 11
point common to both lines, CO is saidto make with DE the angles COD, COB; and these (as havingone arm, CO, common to both) are called adjacent angles. Lastly, if the lines FG, HK cut each other in the point 0,the lines make with each other four angles FOB, HOG, GOK,KOF; and of these GOH, FOR Rve… … Avith OA may be regarded as being made up of the angles AOB,BOO, COD; that is, we may speak of the angle AOD as awhole, of which the parts are the angles AOB, BOC, and COD. Hence we may regard an angle iis a Magnitude, inasmuchas any angle may be regarded as being made up of parts whichare…
Geometry
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