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  1. alternate angles


    • plural
      two angles, formed when a line crosses two other lines, that lie on opposite sides of the transversal line and on opposite relative sides of the other lines. If the two lines crossed are parallel, the alternate angles are equal.
    • noun: alternate angle, plural noun: alternate angles

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    • IPA[ˈôltərˌnāt ˈaNGɡəlz]


    • plural
      two angles, not adjoining one another, that are formed on opposite sides of a line that ...

    Oxford American Dictionary