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  1. Oxford American Dictionary

    exterior angle

    • IPA[ɪkˈstɪriər]

    美式

    • n.
      the angle between a side of a rectilinear figure and an adjacent side extended outward.

    • noun: exterior angle, plural noun: exterior angles

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    exterior angle

    英式

    • n.
      the angle between a side of a rectilinear figure and an adjacent side extended outward.

    Oxford Dictionary