Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 42
hin -^ and partly without the circle. AB is a secant 8. A tangent is a lin« which has but onepoint in common with the circumference. CDis a tangent. _ The point M, where the tangent touches the ccircumference, is called the point of contact. In like manner, two circumferences toucheach other when… … PROPOSITION I. THEOREM. Er>ery diameter divides the circle and its circumference into twoequal parts» Let AEDF be a circle, and AB a diameter.Now, if the figure AEB be applied to AFB,their common base AB retaining its position,the curve line AEB must fall exactly on thecurve line AFB, otherwise…
Trigonometry · Geometry
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