A complete and practical solution book for the common school teacher (1899)
Fairchild, J[ohn] T[heodore] [from old catalog] · Crawfis College, Ohio, The author · leaf 183
F=F, etc. (9) Draw FD parallel to OL, or to CS, and RO parallel to DL;then the two triangles FDBandORF are similar. (10) We know that S, R and M are the middle points of AB, BC and CA, and that the triangles XBP and WSL, PEZand VMN, XYE, VMN are similar. (11) The figure AXPB is a trapezoid, and… … FIG. 46. MEN SURA TION. im (15) From this we find LB = 48£ ft, AL=51^ ft., CF = 47^ ft., FB:=52£ ft., CN=46 ft., and NA=54 ft. (16) ZSCB=30°, also /DFB, as FB=FB, or 52| ft. (17) From the note under Fig. 40, DB=| of FB, or 26£ ft. (18) FD=V(FB2-fBT)2)=54.466ft. (19) RO, or DL=LB—BD=22i ft. (20) By…
Arithmetic · Geometry
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