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Elements of geometry : containing books I to III (1886)
Smith, J. Hamblin · Toronto : W.J. Gage · leaf 185
s at 0 = twice sum of zs BAD, BCD.Eut sum of l s at 0=4 right z s ; I. 15, Cor. 2. .-. fcwioe sum of z s BAD, BCD = 4 right z s ;.-. sum of z s BAD, BCD=t\\o righlSimilarly, it m;iy be shewn that sum of L s ABC, .4.1)6=two righl Q. E. D. H 178 EUCLIDS ELEMENTS. [Book HI. Proposition XXXI. Theorem.… … Let .1/; be a ©, of which 0 is the centre and nC adiami Draw AC, dividing the © into the segments .1/., ADO. Join HA, AD, DC. 7 \ ,i must the l in the temicirclt BAG he a rl.i , una l ini A BC, gteater than a semicircle, less than a rt. l , and ljmeni .1/. U ■ than a semicircle, greater than a rt.…Geometry
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