An elementary treatise on geometry : simplified for beginners not versed in algebra (1833)
Grund, Francis J. (Francis Joseph), 1805-1863 · Boston : Carter, Hendee & Co. · leaf 115
(its equal);10 110 GEOMETRY. and as the arc BK is half of the arc AB, the angle y, •made hy the tangent BD and the chord AB, may likewisehe measured hy half the arc AB. Q. What do you mean by saying that half the arc ABmeasures the angle y ? A. That if the arc AB is given in degi-ees^… … What relation does the angle w, formed hy the tworadii CA, CF, hear to the angle y, formed hy the ticochords ABj FB, if the legs of both these angles stand onthe extremities of the same arc AF1 A. The angle w, formed by the ttvo radii CA, CF, istwice as great as the angle y, formed hy the two…
Geometry, Plane
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