A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 27
emember its meaning. A Chord is a right line, joining theextremities of an arc. The Chord of an Arc is said to be subtended (from sub,under, and teno, to stretch), because it seems stretched underthe arc like the string of a bow. In the cut, there are fourarcs, and as many chords. The lower arc is… … ARC AND CHORD.
Astronomy
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