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 114
n from the centre, C, to thestraight line ED, will be greater than the radius AC;consequently every point in the line ED, except the pointA itself, is without the circle. Q. And lohat other truths can you infer from the onelast established ? A. \. A radius or diameter, drawn to the point oftangent,… … What relation does the angle ACB, measured by thearc AB hear to the angle y, formed by the tangent BDnnd the chord AB, ichich subtends the arc AB ? A. The angle ACB, at the centre of the circle, istwice as great as the angle y, formed by the tangent BD,and the chord AB. Q. How can you prove this ?…
Geometry, Plane
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