Elements of geometry : containing books I to III (1886)
Smith, J. Hamblin · Toronto : W.J. Gage · leaf 155
Then v 6A = OC, :.lOCA = lOAC\ La. . sum ot l b 0( -1. OJO = twice z (X4C.But i £00 = sum of 1 s Or. I. 0 J .• ■. I. 32. • lBOC= twice z 0.40.mat is, . £00 = twice l BAC 145 V/T.V ///M//-V7.s\ fBook tlX. Next, suppose 0 to be within (tig 1), or without (fig. 2) thelBAO. Fig. 2. … Join AO, and produce it to meet the Oc ■ in D.Then, :is in the firs! L COB = twicer OL&D,and/ BOD= twice/ /M/>;.-., fig. 1, sum of - B <(>/>. BOD = twice sum of i s r.4D, thai is, l BOC = twin /..I. And, fig. 2, difference of zs ro/>, y;<//* = twice differenceof zs CAD, BA D,…
Geometry
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