Tanner, J. H. (John Henry), b. 1861, Allen, Joseph · New York, American Book Co · leaf 230
ementary geometry, the tangent bisects internallythe angle between the focal radii. Then, since the normal isperpendicular to the tangent, the normal Pi JT bisects the ex-ternal angle F^Pi W. 128, 1291 THE HYPERBOLA 213 These facts suggest a method, analogous to that ofArt. 121, for constructing… … Fio. 89. in which a and h have the same values as iu equation (1).This curve is evidently an hyperbola, and has for its trans-verse and conjugate axes, respectively, the conjugate andtransverse axes of the original, or primary, hyperbola. Two 214 SPECIAL PROPERTIES OF THE CONICS [Ci;. IX sucli…
Geometry, Analytic
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