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 204
er just one acre in-side the field? Solution. (1) Let P be the point to which the horse is tied,B and A the points inthe circumference of thefield to which the horsecan graze, and O the cen-ter of the field. (2) Let BO=r=V16(XH-7r = the radius of the field,and angle BPO = angleOBP=0. (3) Draw… … |R/-sin0.(6) Then we have 7tR2(7T—20) . Trr 4Rrsin0 = rR2 20 (7) But r=2Rcos0.
Arithmetic · Geometry
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