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 179
e the triangle. CFD, BDE and AFE=the threesectors grazed over by thehorses. 0=space ungrazed. (2) Since the angle of an equilateral triangle is 60°, because thethree angles of every triangleare equal to two right angles,each sector is \ of a circle.The three sectors=^ of acircle. (3) Area of… … FIG. 38. rd. PROBLEM 348. A goat is tethered by a cord 30 ft. long, to the corner of a shed intthe form of an equilateral triangle, side 20 ft.: find area over which itmay graze outdide of the shed. Solution. (1) Let ABC be the shed. (2) The goat can graze with the 30 ft. cord over a cir-cle,…
Arithmetic · Geometry
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