Tangent to a Hyperbola Small 263×320 Medium 525×640 Large 840×1024 Download Tiff Original 1969×2400 | (341.4 KB) Description Diagram part of a hyperbola with a tangent line that illustrates "A line through a point on the hyperbola and bisecting the internal angle between the focal radii is a tangent." Keywords cone, conic section, conics, focal radii, foci, focus, hyperbola, hyperbolas, lines, radius, tangent line Galleries Conic Sections: Hyperbolas Source: Arthur Latham Baker The Elements of Solid Geometr with Numerous Exercises (Boston, MA: Ginn & Company, 1893)