Elements of geometry : containing books I to III (1886)
Smith, J. Hamblin · Toronto : W.J. Gage · leaf 171
EF is a quadrilateral fig. inscribed in a • , .-. sum of L s FED, F( D=two rt. z s. IIL 22. Also, sum ofz s DFA, DFB=two rt. z s. I. 13. .-. sum of t \ >i I. DFB=sum of z s .F£D, .FCD ;and z iii; has been proved = z .FCD ; :.lDFA= lEED,that is, z DFA= z in segment .FED. Q. E. u. Ex. The chord… … Lei AB be .In- given st. line, and C the given z.H is required /<> describi <>■> .1/- a w »< «/ a 9 tofttcfc*/iaW contain am l = 0. A- pt. .1 in st. line AB make z B4D= t C. I. 23Draw .1 E to ,f /. and 1From F draw IGi to J /-, meeting A E in (/. Join OB. Then in a . I./. B#F ;•.■…
Geometry
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