, a relative term, understood of things disposed so near each other, that they join their surfaces, or touch.
Contiguous Angles, are such as have one leg or fide common to each angle; and are otherwise called adjoining angles; in contradistinction to those made by continuing their legs through the point of contact, which are called opposite or vertical angles.
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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.
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