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 199
B, COB andCOA=J- of 292.28343 sq.rd.=97.42731 sq. rd. (6) Let SD, or SL=r, the radius of the small circle. (7) r=(AOBx2)-^AB+OB +AO, or twice the area FIG66, of AOB divided by the perimeter=3.4807. (8) .\ SF=6.9614 rd. The area of sector PSL small circle, because the angle PSL=60°. (9) ^27r=3 times… … the MENSURATION. 186 PROBLEM 380. If 2 ft. be the radius of a circle, how far from the center must achord be drawn parallel! to divide the semicircle into two equal parts? Solution. (1) Let ADB be the semicircle, AB the diameter, GH the line thatdivides the semicircle into twoequal parts. (2) On…
Arithmetic · Geometry
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