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2 definitions found
 for interior angle
From The Collaborative International Dictionary of English v.0.48 :

  Interior \In*te"ri*or\, a. [L., compar. fr. inter between: cf.
     F. int['e]rieur. See Inter-, and cf. Intimate.]
     [1913 Webster]
     1. Being within any limits, inclosure, or substance; inside;
        internal; inner; -- opposed to exterior, or
        superficial; as, the interior apartments of a house; the
        interior surface of a hollow ball.
        [1913 Webster]
     2. Remote from the limits, frontier, or shore; inland; as,
        the interior parts of a region or country.
        [1913 Webster]
     Interior angle (Geom.), an angle formed between two sides,
        within any rectilinear figure, as a polygon, or between
        two parallel lines by these lines and another intersecting
        them; -- called also internal angle.
     Interior planets (Astron.), those planets within the orbit
        of the earth.
     Interior screw, a screw cut on an interior surface, as in a
        nut; a female screw.
     Syn: Internal; inside; inner; inland; inward.
          [1913 Webster]

From WordNet (r) 3.0 (2006) :

  interior angle
      n 1: the angle inside two adjacent sides of a polygon [syn:
           interior angle, internal angle]

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